6ef34c09c6
https://source.android.com/docs/security/bulletin/2023-10-01
* tag 'ASB-2023-10-06_11-5.4' of https://android.googlesource.com/kernel/common:
UPSTREAM: arm64: efi: Make efi_rt_lock a raw_spinlock
UPSTREAM: net: sched: sch_qfq: Fix UAF in qfq_dequeue()
UPSTREAM: net/sched: sch_hfsc: Ensure inner classes have fsc curve
UPSTREAM: net/sched: sch_qfq: account for stab overhead in qfq_enqueue
UPSTREAM: netfilter: nf_tables: prevent OOB access in nft_byteorder_eval
UPSTREAM: af_unix: Fix null-ptr-deref in unix_stream_sendpage().
Linux 5.4.254
sch_netem: fix issues in netem_change() vs get_dist_table()
alpha: remove __init annotation from exported page_is_ram()
scsi: core: Fix possible memory leak if device_add() fails
scsi: snic: Fix possible memory leak if device_add() fails
scsi: 53c700: Check that command slot is not NULL
scsi: storvsc: Fix handling of virtual Fibre Channel timeouts
scsi: core: Fix legacy /proc parsing buffer overflow
netfilter: nf_tables: report use refcount overflow
nvme-rdma: fix potential unbalanced freeze & unfreeze
nvme-tcp: fix potential unbalanced freeze & unfreeze
btrfs: set cache_block_group_error if we find an error
btrfs: don't stop integrity writeback too early
ibmvnic: Handle DMA unmapping of login buffs in release functions
net/mlx5: Allow 0 for total host VFs
dmaengine: mcf-edma: Fix a potential un-allocated memory access
wifi: cfg80211: fix sband iftype data lookup for AP_VLAN
IB/hfi1: Fix possible panic during hotplug remove
drivers: net: prevent tun_build_skb() to exceed the packet size limit
dccp: fix data-race around dp->dccps_mss_cache
bonding: Fix incorrect deletion of ETH_P_8021AD protocol vid from slaves
net/packet: annotate data-races around tp->status
mISDN: Update parameter type of dsp_cmx_send()
selftests/rseq: Fix build with undefined __weak
drm/nouveau/disp: Revert a NULL check inside nouveau_connector_get_modes
x86: Move gds_ucode_mitigated() declaration to header
x86/mm: Fix VDSO and VVAR placement on 5-level paging machines
x86/cpu/amd: Enable Zenbleed fix for AMD Custom APU 0405
usb: common: usb-conn-gpio: Prevent bailing out if initial role is none
usb: dwc3: Properly handle processing of pending events
usb-storage: alauda: Fix uninit-value in alauda_check_media()
binder: fix memory leak in binder_init()
iio: cros_ec: Fix the allocation size for cros_ec_command
nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput
x86/pkeys: Revert a5eff72597
("x86/pkeys: Add PKRU value to init_fpstate")
radix tree test suite: fix incorrect allocation size for pthreads
drm/nouveau/gr: enable memory loads on helper invocation on all channels
dmaengine: pl330: Return DMA_PAUSED when transaction is paused
ipv6: adjust ndisc_is_useropt() to also return true for PIO
mmc: moxart: read scr register without changing byte order
Linux 5.4.253
Revert "driver core: Annotate dev_err_probe() with __must_check"
drivers: core: fix kernel-doc markup for dev_err_probe()
driver code: print symbolic error code
driver core: Annotate dev_err_probe() with __must_check
ARM: dts: nxp/imx6sll: fix wrong property name in usbphy node
ARM: dts: imx6sll: fixup of operating points
ARM: dts: imx: add usb alias
ARM: dts: imx: Align L2 cache-controller nodename with dtschema
ARM: dts: imx6sll: Make ssi node name same as other platforms
arm64: dts: stratix10: fix incorrect I2C property for SCL signal
ceph: defer stopping mdsc delayed_work
ceph: use kill_anon_super helper
ceph: show tasks waiting on caps in debugfs caps file
PM: sleep: wakeirq: fix wake irq arming
PM / wakeirq: support enabling wake-up irq after runtime_suspend called
selftests/rseq: Play nice with binaries statically linked against glibc 2.35+
selftests/rseq: check if libc rseq support is registered
powerpc/mm/altmap: Fix altmap boundary check
mtd: rawnand: omap_elm: Fix incorrect type in assignment
test_firmware: return ENOMEM instead of ENOSPC on failed memory allocation
test_firmware: prevent race conditions by a correct implementation of locking
ext2: Drop fragment support
fs: Protect reconfiguration of sb read-write from racing writes
net: usbnet: Fix WARNING in usbnet_start_xmit/usb_submit_urb
Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_ready_cb
fs/sysv: Null check to prevent null-ptr-deref bug
net: tap_open(): set sk_uid from current_fsuid()
net: tun_chr_open(): set sk_uid from current_fsuid()
mtd: rawnand: meson: fix OOB available bytes for ECC
mtd: spinand: toshiba: Fix ecc_get_status
USB: zaurus: Add ID for A-300/B-500/C-700
libceph: fix potential hang in ceph_osdc_notify()
scsi: zfcp: Defer fc_rport blocking until after ADISC response
tcp_metrics: fix data-race in tcpm_suck_dst() vs fastopen
tcp_metrics: annotate data-races around tm->tcpm_net
tcp_metrics: annotate data-races around tm->tcpm_vals[]
tcp_metrics: annotate data-races around tm->tcpm_lock
tcp_metrics: annotate data-races around tm->tcpm_stamp
tcp_metrics: fix addr_same() helper
ip6mr: Fix skb_under_panic in ip6mr_cache_report()
net: dcb: choose correct policy to parse DCB_ATTR_BCN
net: ll_temac: fix error checking of irq_of_parse_and_map()
net: ll_temac: Switch to use dev_err_probe() helper
driver core: add device probe log helper
bpf: sockmap: Remove preempt_disable in sock_map_sk_acquire
net/sched: cls_route: No longer copy tcf_result on update to avoid use-after-free
net/sched: cls_fw: No longer copy tcf_result on update to avoid use-after-free
net/sched: cls_u32: No longer copy tcf_result on update to avoid use-after-free
net: add missing data-race annotation for sk_ll_usec
net: add missing data-race annotations around sk->sk_peek_off
net: add missing READ_ONCE(sk->sk_rcvbuf) annotation
net: add missing READ_ONCE(sk->sk_sndbuf) annotation
net: add missing READ_ONCE(sk->sk_rcvlowat) annotation
net: annotate data-races around sk->sk_max_pacing_rate
mISDN: hfcpci: Fix potential deadlock on &hc->lock
net: sched: cls_u32: Fix match key mis-addressing
perf test uprobe_from_different_cu: Skip if there is no gcc
rtnetlink: let rtnl_bridge_setlink checks IFLA_BRIDGE_MODE length
net/mlx5e: fix return value check in mlx5e_ipsec_remove_trailer()
net/mlx5: DR, fix memory leak in mlx5dr_cmd_create_reformat_ctx
KVM: s390: fix sthyi error handling
word-at-a-time: use the same return type for has_zero regardless of endianness
loop: Select I/O scheduler 'none' from inside add_disk()
perf: Fix function pointer case
arm64: Fix bit-shifting UB in the MIDR_CPU_MODEL() macro
arm64: Add AMPERE1 to the Spectre-BHB affected list
ASoC: cs42l51: fix driver to properly autoload with automatic module loading
net/sched: sch_qfq: account for stab overhead in qfq_enqueue
btrfs: fix race between quota disable and quota assign ioctls
btrfs: qgroup: return ENOTCONN instead of EINVAL when quotas are not enabled
btrfs: qgroup: remove one-time use variables for quota_root checks
cpufreq: intel_pstate: Drop ACPI _PSS states table patching
ACPI: processor: perflib: Avoid updating frequency QoS unnecessarily
ACPI: processor: perflib: Use the "no limit" frequency QoS
dm cache policy smq: ensure IO doesn't prevent cleaner policy progress
ASoC: wm8904: Fill the cache for WM8904_ADC_TEST_0 register
s390/dasd: fix hanging device after quiesce/resume
virtio-net: fix race between set queues and probe
btrfs: check if the transaction was aborted at btrfs_wait_for_commit()
irq-bcm6345-l1: Do not assume a fixed block to cpu mapping
tpm_tis: Explicitly check for error code
btrfs: check for commit error at btrfs_attach_transaction_barrier()
hwmon: (nct7802) Fix for temp6 (PECI1) processed even if PECI1 disabled
staging: ks7010: potential buffer overflow in ks_wlan_set_encode_ext()
Documentation: security-bugs.rst: clarify CVE handling
Documentation: security-bugs.rst: update preferences when dealing with the linux-distros group
Revert "usb: xhci: tegra: Fix error check"
usb: xhci-mtk: set the dma max_seg_size
USB: quirks: add quirk for Focusrite Scarlett
usb: ohci-at91: Fix the unhandle interrupt when resume
usb: dwc3: don't reset device side if dwc3 was configured as host-only
usb: dwc3: pci: skip BYT GPIO lookup table for hardwired phy
Revert "usb: dwc3: core: Enable AutoRetry feature in the controller"
can: gs_usb: gs_can_close(): add missing set of CAN state to CAN_STATE_STOPPED
USB: serial: simple: sort driver entries
USB: serial: simple: add Kaufmann RKS+CAN VCP
USB: serial: option: add Quectel EC200A module support
USB: serial: option: support Quectel EM060K_128
serial: sifive: Fix sifive_serial_console_setup() section
serial: 8250_dw: Preserve original value of DLF register
tracing: Fix warning in trace_buffered_event_disable()
ring-buffer: Fix wrong stat of cpu_buffer->read
ata: pata_ns87415: mark ns87560_tf_read static
dm raid: fix missing reconfig_mutex unlock in raid_ctr() error paths
block: Fix a source code comment in include/uapi/linux/blkzoned.h
ASoC: fsl_spdif: Silence output on stop
drm/msm: Fix IS_ERR_OR_NULL() vs NULL check in a5xx_submit_in_rb()
drm/msm/adreno: Fix snapshot BINDLESS_DATA size
drm/msm/dpu: drop enum dpu_core_perf_data_bus_id
RDMA/mlx4: Make check for invalid flags stricter
benet: fix return value check in be_lancer_xmit_workarounds()
net/sched: mqprio: Add length check for TCA_MQPRIO_{MAX/MIN}_RATE64
net/sched: mqprio: add extack to mqprio_parse_nlattr()
net/sched: mqprio: refactor nlattr parsing to a separate function
platform/x86: msi-laptop: Fix rfkill out-of-sync on MSI Wind U100
team: reset team's flags when down link is P2P device
bonding: reset bond's flags when down link is P2P device
tcp: Reduce chance of collisions in inet6_hashfn().
ipv6 addrconf: fix bug where deleting a mngtmpaddr can create a new temporary address
ethernet: atheros: fix return value check in atl1e_tso_csum()
phy: hisilicon: Fix an out of bounds check in hisi_inno_phy_probe()
vxlan: calculate correct header length for GPE
i40e: Fix an NULL vs IS_ERR() bug for debugfs_create_dir()
ext4: fix to check return value of freeze_bdev() in ext4_shutdown()
keys: Fix linking a duplicate key to a keyring's assoc_array
uapi: General notification queue definitions
scsi: qla2xxx: Array index may go out of bound
scsi: qla2xxx: Fix inconsistent format argument type in qla_os.c
pwm: meson: fix handling of period/duty if greater than UINT_MAX
pwm: meson: Simplify duplicated per-channel tracking
pwm: meson: Remove redundant assignment to variable fin_freq
ftrace: Fix possible warning on checking all pages used in ftrace_process_locs()
ftrace: Store the order of pages allocated in ftrace_page
ftrace: Check if pages were allocated before calling free_pages()
ftrace: Add information on number of page groups allocated
fs: dlm: interrupt posix locks only when process is killed
dlm: rearrange async condition return
dlm: cleanup plock_op vs plock_xop
PCI/ASPM: Avoid link retraining race
PCI/ASPM: Factor out pcie_wait_for_retrain()
PCI/ASPM: Return 0 or -ETIMEDOUT from pcie_retrain_link()
ext4: Fix reusing stale buffer heads from last failed mounting
ext4: rename journal_dev to s_journal_dev inside ext4_sb_info
btrfs: fix extent buffer leak after tree mod log failure at split_node()
btrfs: fix race between quota disable and relocation
btrfs: qgroup: catch reserved space leaks at unmount time
bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent
bcache: remove 'int n' from parameter list of bch_bucket_alloc_set()
gpio: tps68470: Make tps68470_gpio_output() always set the initial value
jbd2: Fix wrongly judgement for buffer head removing while doing checkpoint
jbd2: recheck chechpointing non-dirty buffer
jbd2: remove redundant buffer io error checks
jbd2: fix kernel-doc markups
jbd2: fix incorrect code style
Linux 5.4.252
x86: fix backwards merge of GDS/SRSO bit
xen/netback: Fix buffer overrun triggered by unusual packet
x86/cpu, kvm: Add support for CPUID_80000021_EAX
x86/bugs: Increase the x86 bugs vector size to two u32s
tools headers cpufeatures: Sync with the kernel sources
x86/cpufeatures: Assign dedicated feature word for CPUID_0x8000001F[EAX]
x86/cpu: Add VM page flush MSR availablility as a CPUID feature
x86/cpufeatures: Add SEV-ES CPU feature
Documentation/x86: Fix backwards on/off logic about YMM support
x86/mm: Initialize text poking earlier
mm: Move mm_cachep initialization to mm_init()
x86/mm: Use mm_alloc() in poking_init()
x86/mm: fix poking_init() for Xen PV guests
x86/xen: Fix secondary processors' FPU initialization
KVM: Add GDS_NO support to KVM
x86/speculation: Add Kconfig option for GDS
x86/speculation: Add force option to GDS mitigation
x86/speculation: Add Gather Data Sampling mitigation
x86/fpu: Move FPU initialization into arch_cpu_finalize_init()
x86/fpu: Mark init functions __init
x86/fpu: Remove cpuinfo argument from init functions
init, x86: Move mem_encrypt_init() into arch_cpu_finalize_init()
init: Invoke arch_cpu_finalize_init() earlier
init: Remove check_bugs() leftovers
um/cpu: Switch to arch_cpu_finalize_init()
sparc/cpu: Switch to arch_cpu_finalize_init()
sh/cpu: Switch to arch_cpu_finalize_init()
mips/cpu: Switch to arch_cpu_finalize_init()
m68k/cpu: Switch to arch_cpu_finalize_init()
ia64/cpu: Switch to arch_cpu_finalize_init()
ARM: cpu: Switch to arch_cpu_finalize_init()
x86/cpu: Switch to arch_cpu_finalize_init()
init: Provide arch_cpu_finalize_init()
Revert "posix-timers: Ensure timer ID search-loop limit is valid"
Revert "drm/panel: Initialise panel dev and funcs through drm_panel_init()"
Revert "drm/panel: Add and fill drm_panel type field"
Revert "drm/panel: simple: Add connector_type for innolux_at043tn24"
Revert "Revert "8250: add support for ASIX devices with a FIFO bug""
Linux 5.4.251
tracing/histograms: Return an error if we fail to add histogram to hist_vars list
tcp: annotate data-races around fastopenq.max_qlen
tcp: annotate data-races around tp->notsent_lowat
tcp: annotate data-races around rskq_defer_accept
tcp: annotate data-races around tp->linger2
net: Replace the limit of TCP_LINGER2 with TCP_FIN_TIMEOUT_MAX
tcp: annotate data-races around tp->tcp_tx_delay
netfilter: nf_tables: can't schedule in nft_chain_validate
netfilter: nf_tables: fix spurious set element insertion failure
llc: Don't drop packet from non-root netns.
fbdev: au1200fb: Fix missing IRQ check in au1200fb_drv_probe
Revert "tcp: avoid the lookup process failing to get sk in ehash table"
net:ipv6: check return value of pskb_trim()
iavf: Fix use-after-free in free_netdev
net: ethernet: ti: cpsw_ale: Fix cpsw_ale_get_field()/cpsw_ale_set_field()
pinctrl: amd: Use amd_pinconf_set() for all config options
fbdev: imxfb: warn about invalid left/right margin
spi: bcm63xx: fix max prepend length
igb: Fix igb_down hung on surprise removal
wifi: iwlwifi: mvm: avoid baid size integer overflow
wifi: wext-core: Fix -Wstringop-overflow warning in ioctl_standard_iw_point()
devlink: report devlink_port_type_warn source device
bpf: Address KCSAN report on bpf_lru_list
sched/fair: Don't balance task to its current running CPU
arm64: mm: fix VA-range sanity check
posix-timers: Ensure timer ID search-loop limit is valid
md/raid10: prevent soft lockup while flush writes
md: fix data corruption for raid456 when reshape restart while grow up
nbd: Add the maximum limit of allocated index in nbd_dev_add
debugobjects: Recheck debug_objects_enabled before reporting
ext4: correct inline offset when handling xattrs in inode body
drm/client: Fix memory leak in drm_client_modeset_probe
drm/client: Fix memory leak in drm_client_target_cloned
can: bcm: Fix UAF in bcm_proc_show()
selftests: tc: set timeout to 15 minutes
fuse: revalidate: don't invalidate if interrupted
btrfs: fix warning when putting transaction with qgroups enabled after abort
perf probe: Add test for regression introduced by switch to die_get_decl_file()
drm/atomic: Fix potential use-after-free in nonblocking commits
scsi: qla2xxx: Remove unused nvme_ls_waitq wait queue
scsi: qla2xxx: Pointer may be dereferenced
scsi: qla2xxx: Correct the index of array
scsi: qla2xxx: Check valid rport returned by fc_bsg_to_rport()
scsi: qla2xxx: Fix potential NULL pointer dereference
scsi: qla2xxx: Wait for io return on terminate rport
tracing/probes: Fix not to count error code to total length
tracing: Fix null pointer dereference in tracing_err_log_open()
xtensa: ISS: fix call to split_if_spec
ring-buffer: Fix deadloop issue on reading trace_pipe
tracing/histograms: Add histograms to hist_vars if they have referenced variables
tty: serial: samsung_tty: Fix a memory leak in s3c24xx_serial_getclk() when iterating clk
tty: serial: samsung_tty: Fix a memory leak in s3c24xx_serial_getclk() in case of error
Revert "8250: add support for ASIX devices with a FIFO bug"
meson saradc: fix clock divider mask length
ceph: don't let check_caps skip sending responses for revoke msgs
hwrng: imx-rngc - fix the timeout for init and self check
firmware: stratix10-svc: Fix a potential resource leak in svc_create_memory_pool()
serial: atmel: don't enable IRQs prematurely
drm/rockchip: vop: Leave vblank enabled in self-refresh
drm/atomic: Allow vblank-enabled + self-refresh "disable"
fs: dlm: return positive pid value for F_GETLK
md/raid0: add discard support for the 'original' layout
misc: pci_endpoint_test: Re-init completion for every test
misc: pci_endpoint_test: Free IRQs before removing the device
PCI: rockchip: Set address alignment for endpoint mode
PCI: rockchip: Use u32 variable to access 32-bit registers
PCI: rockchip: Fix legacy IRQ generation for RK3399 PCIe endpoint core
PCI: rockchip: Add poll and timeout to wait for PHY PLLs to be locked
PCI: rockchip: Write PCI Device ID to correct register
PCI: rockchip: Assert PCI Configuration Enable bit after probe
PCI: qcom: Disable write access to read only registers for IP v2.3.3
PCI: Add function 1 DMA alias quirk for Marvell 88SE9235
PCI/PM: Avoid putting EloPOS E2/S2/H2 PCIe Ports in D3cold
jfs: jfs_dmap: Validate db_l2nbperpage while mounting
ext4: only update i_reserved_data_blocks on successful block allocation
ext4: fix wrong unit use in ext4_mb_clear_bb
erofs: fix compact 4B support for 16k block size
SUNRPC: Fix UAF in svc_tcp_listen_data_ready()
misc: fastrpc: Create fastrpc scalar with correct buffer count
powerpc: Fail build if using recordmcount with binutils v2.37
net: bcmgenet: Ensure MDIO unregistration has clocks enabled
mtd: rawnand: meson: fix unaligned DMA buffers handling
tpm: tpm_vtpm_proxy: fix a race condition in /dev/vtpmx creation
pinctrl: amd: Only use special debounce behavior for GPIO 0
pinctrl: amd: Detect internal GPIO0 debounce handling
pinctrl: amd: Fix mistake in handling clearing pins at startup
net/sched: make psched_mtu() RTNL-less safe
net/sched: flower: Ensure both minimum and maximum ports are specified
cls_flower: Add extack support for src and dst port range options
wifi: airo: avoid uninitialized warning in airo_get_rate()
erofs: avoid infinite loop in z_erofs_do_read_page() when reading beyond EOF
platform/x86: wmi: Break possible infinite loop when parsing GUID
platform/x86: wmi: move variables
platform/x86: wmi: use guid_t and guid_equal()
platform/x86: wmi: remove unnecessary argument
platform/x86: wmi: Fix indentation in some cases
platform/x86: wmi: Replace UUID redefinitions by their originals
ipv6/addrconf: fix a potential refcount underflow for idev
NTB: ntb_tool: Add check for devm_kcalloc
NTB: ntb_transport: fix possible memory leak while device_register() fails
ntb: intel: Fix error handling in intel_ntb_pci_driver_init()
NTB: amd: Fix error handling in amd_ntb_pci_driver_init()
ntb: idt: Fix error handling in idt_pci_driver_init()
udp6: fix udp6_ehashfn() typo
icmp6: Fix null-ptr-deref of ip6_null_entry->rt6i_idev in icmp6_dev().
ionic: remove WARN_ON to prevent panic_on_warn
ionic: ionic_intr_free parameter change
ionic: move irq request to qcq alloc
ionic: clean irq affinity on queue deinit
ionic: improve irq numa locality
net/sched: cls_fw: Fix improper refcount update leads to use-after-free
net: mvneta: fix txq_map in case of txq_number==1
scsi: qla2xxx: Fix error code in qla2x00_start_sp()
igc: set TP bit in 'supported' and 'advertising' fields of ethtool_link_ksettings
igc: Remove delay during TX ring configuration
drm/panel: simple: Add connector_type for innolux_at043tn24
drm/panel: Add and fill drm_panel type field
drm/panel: Initialise panel dev and funcs through drm_panel_init()
workqueue: clean up WORK_* constant types, clarify masking
net: lan743x: Don't sleep in atomic context
block/partition: fix signedness issue for Amiga partitions
tty: serial: fsl_lpuart: add earlycon for imx8ulp platform
netfilter: nf_tables: prevent OOB access in nft_byteorder_eval
netfilter: conntrack: Avoid nf_ct_helper_hash uses after free
netfilter: nf_tables: fix scheduling-while-atomic splat
netfilter: nf_tables: unbind non-anonymous set if rule construction fails
netfilter: nf_tables: reject unbound anonymous set before commit phase
netfilter: nf_tables: add NFT_TRANS_PREPARE_ERROR to deal with bound set/chain
netfilter: nf_tables: incorrect error path handling with NFT_MSG_NEWRULE
netfilter: nf_tables: add rescheduling points during loop detection walks
netfilter: nf_tables: use net_generic infra for transaction data
netfilter: add helper function to set up the nfnetlink header and use it
netfilter: nftables: add helper function to set the base sequence number
netfilter: nf_tables: fix nat hook table deletion
block: add overflow checks for Amiga partition support
fanotify: disallow mount/sb marks on kernel internal pseudo fs
fs: no need to check source
ARM: orion5x: fix d2net gpio initialization
btrfs: fix race when deleting quota root from the dirty cow roots list
fs: Lock moved directories
fs: Establish locking order for unrelated directories
Revert "f2fs: fix potential corruption when moving a directory"
ext4: Remove ext4 locking of moved directory
fs: avoid empty option when generating legacy mount string
jffs2: reduce stack usage in jffs2_build_xattr_subsystem()
integrity: Fix possible multiple allocation in integrity_inode_get()
bcache: Remove unnecessary NULL point check in node allocations
mmc: sdhci: fix DMA configure compatibility issue when 64bit DMA mode is used.
mmc: core: disable TRIM on Micron MTFC4GACAJCN-1M
mmc: core: disable TRIM on Kingston EMMC04G-M627
NFSD: add encoding of op_recall flag for write delegation
ALSA: jack: Fix mutex call in snd_jack_report()
i2c: xiic: Don't try to handle more interrupt events after error
i2c: xiic: Defer xiic_wakeup() and __xiic_start_xfer() in xiic_process()
sh: dma: Fix DMA channel offset calculation
net: dsa: tag_sja1105: fix MAC DA patching from meta frames
net/sched: act_pedit: Add size check for TCA_PEDIT_PARMS_EX
xsk: Honor SO_BINDTODEVICE on bind
xsk: Improve documentation for AF_XDP
tcp: annotate data races in __tcp_oow_rate_limited()
net: bridge: keep ports without IFF_UNICAST_FLT in BR_PROMISC mode
powerpc: allow PPC_EARLY_DEBUG_CPM only when SERIAL_CPM=y
f2fs: fix error path handling in truncate_dnode()
mailbox: ti-msgmgr: Fill non-message tx data fields with 0x0
spi: bcm-qspi: return error if neither hif_mspi nor mspi is available
Add MODULE_FIRMWARE() for FIRMWARE_TG357766.
sctp: fix potential deadlock on &net->sctp.addr_wq_lock
rtc: st-lpc: Release some resources in st_rtc_probe() in case of error
pwm: sysfs: Do not apply state to already disabled PWMs
pwm: imx-tpm: force 'real_period' to be zero in suspend
mfd: stmpe: Only disable the regulators if they are enabled
KVM: s390: vsie: fix the length of APCB bitmap
mfd: stmfx: Fix error path in stmfx_chip_init
serial: 8250_omap: Use force_suspend and resume for system suspend
mfd: intel-lpss: Add missing check for platform_get_resource
usb: dwc3: qcom: Release the correct resources in dwc3_qcom_remove()
KVM: s390: fix KVM_S390_GET_CMMA_BITS for GFNs in memslot holes
mfd: rt5033: Drop rt5033-battery sub-device
usb: hide unused usbfs_notify_suspend/resume functions
usb: phy: phy-tahvo: fix memory leak in tahvo_usb_probe()
extcon: Fix kernel doc of property capability fields to avoid warnings
extcon: Fix kernel doc of property fields to avoid warnings
usb: dwc3: qcom: Fix potential memory leak
media: usb: siano: Fix warning due to null work_func_t function pointer
media: videodev2.h: Fix struct v4l2_input tuner index comment
media: usb: Check az6007_read() return value
sh: j2: Use ioremap() to translate device tree address into kernel memory
w1: fix loop in w1_fini()
block: change all __u32 annotations to __be32 in affs_hardblocks.h
block: fix signed int overflow in Amiga partition support
usb: dwc3: gadget: Propagate core init errors to UDC during pullup
USB: serial: option: add LARA-R6 01B PIDs
hwrng: st - keep clock enabled while hwrng is registered
hwrng: st - Fix W=1 unused variable warning
NFSv4.1: freeze the session table upon receiving NFS4ERR_BADSESSION
ARC: define ASM_NL and __ALIGN(_STR) outside #ifdef __ASSEMBLY__ guard
modpost: fix off by one in is_executable_section()
crypto: marvell/cesa - Fix type mismatch warning
modpost: fix section mismatch message for R_ARM_{PC24,CALL,JUMP24}
modpost: fix section mismatch message for R_ARM_ABS32
crypto: nx - fix build warnings when DEBUG_FS is not enabled
hwrng: virtio - Fix race on data_avail and actual data
hwrng: virtio - always add a pending request
hwrng: virtio - don't waste entropy
hwrng: virtio - don't wait on cleanup
hwrng: virtio - add an internal buffer
powerpc/mm/dax: Fix the condition when checking if altmap vmemap can cross-boundary
pinctrl: at91-pio4: check return value of devm_kasprintf()
perf dwarf-aux: Fix off-by-one in die_get_varname()
pinctrl: cherryview: Return correct value if pin in push-pull mode
PCI: Add pci_clear_master() stub for non-CONFIG_PCI
PCI: ftpci100: Release the clock resources
PCI: pciehp: Cancel bringup sequence if card is not present
scsi: 3w-xxxx: Add error handling for initialization failure in tw_probe()
PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free
scsi: qedf: Fix NULL dereference in error handling
ASoC: imx-audmix: check return value of devm_kasprintf()
clk: keystone: sci-clk: check return value of kasprintf()
clk: cdce925: check return value of kasprintf()
ALSA: ac97: Fix possible NULL dereference in snd_ac97_mixer
clk: tegra: tegra124-emc: Fix potential memory leak
drm/radeon: fix possible division-by-zero errors
drm/amdkfd: Fix potential deallocation of previously deallocated memory.
fbdev: omapfb: lcd_mipid: Fix an error handling path in mipid_spi_probe()
arm64: dts: renesas: ulcb-kf: Remove flow control for SCIF1
IB/hfi1: Fix sdma.h tx->num_descs off-by-one errors
soc/fsl/qe: fix usb.c build errors
ASoC: es8316: Do not set rate constraints for unsupported MCLKs
ASoC: es8316: Increment max value for ALC Capture Target Volume control
memory: brcmstb_dpfe: fix testing array offset after use
ARM: ep93xx: fix missing-prototype warnings
drm/panel: simple: fix active size for Ampire AM-480272H3TMQW-T01H
arm64: dts: qcom: msm8916: correct camss unit address
ARM: dts: gta04: Move model property out of pinctrl node
RDMA/bnxt_re: Fix to remove an unnecessary log
drm: sun4i_tcon: use devm_clk_get_enabled in `sun4i_tcon_init_clocks`
Input: adxl34x - do not hardcode interrupt trigger type
ARM: dts: BCM5301X: Drop "clock-names" from the SPI node
Input: drv260x - sleep between polling GO bit
radeon: avoid double free in ci_dpm_init()
netlink: Add __sock_i_ino() for __netlink_diag_dump().
ipvlan: Fix return value of ipvlan_queue_xmit()
netfilter: nf_conntrack_sip: fix the ct_sip_parse_numerical_param() return value.
netfilter: conntrack: dccp: copy entire header to stack buffer, not just basic one
lib/ts_bm: reset initial match offset for every block of text
net: nfc: Fix use-after-free caused by nfc_llcp_find_local
nfc: llcp: simplify llcp_sock_connect() error paths
gtp: Fix use-after-free in __gtp_encap_destroy().
selftests: rtnetlink: remove netdevsim device after ipsec offload test
netlink: do not hard code device address lenth in fdb dumps
netlink: fix potential deadlock in netlink_set_err()
wifi: ath9k: convert msecs to jiffies where needed
wifi: cfg80211: rewrite merging of inherited elements
wifi: iwlwifi: pull from TXQs with softirqs disabled
rtnetlink: extend RTEXT_FILTER_SKIP_STATS to IFLA_VF_INFO
wifi: ath9k: Fix possible stall on ath9k_txq_list_has_key()
memstick r592: make memstick_debug_get_tpc_name() static
kexec: fix a memory leak in crash_shrink_memory()
watchdog/perf: more properly prevent false positives with turbo modes
watchdog/perf: define dummy watchdog_update_hrtimer_threshold() on correct config
wifi: rsi: Do not set MMC_PM_KEEP_POWER in shutdown
wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes
wifi: ray_cs: Fix an error handling path in ray_probe()
wifi: ray_cs: Drop useless status variable in parse_addr()
wifi: ray_cs: Utilize strnlen() in parse_addr()
wifi: wl3501_cs: Fix an error handling path in wl3501_probe()
wl3501_cs: use eth_hw_addr_set()
net: create netdev->dev_addr assignment helpers
wl3501_cs: Fix misspelling and provide missing documentation
wl3501_cs: Remove unnecessary NULL check
wl3501_cs: Fix a bunch of formatting issues related to function docs
wifi: atmel: Fix an error handling path in atmel_probe()
wifi: orinoco: Fix an error handling path in orinoco_cs_probe()
wifi: orinoco: Fix an error handling path in spectrum_cs_probe()
regulator: core: Streamline debugfs operations
regulator: core: Fix more error checking for debugfs_create_dir()
nfc: llcp: fix possible use of uninitialized variable in nfc_llcp_send_connect()
nfc: constify several pointers to u8, char and sk_buff
wifi: mwifiex: Fix the size of a memory allocation in mwifiex_ret_802_11_scan()
spi: spi-geni-qcom: Correct CS_TOGGLE bit in SPI_TRANS_CFG
samples/bpf: Fix buffer overflow in tcp_basertt
wifi: ath9k: avoid referencing uninit memory in ath9k_wmi_ctrl_rx
wifi: ath9k: fix AR9003 mac hardware hang check register offset calculation
ima: Fix build warnings
pstore/ram: Add check for kstrdup
evm: Complete description of evm_inode_setattr()
ARM: 9303/1: kprobes: avoid missing-declaration warnings
powercap: RAPL: Fix CONFIG_IOSF_MBI dependency
PM: domains: fix integer overflow issues in genpd_parse_state()
clocksource/drivers/cadence-ttc: Fix memory leak in ttc_timer_probe
clocksource/drivers/cadence-ttc: Use ttc driver as platform driver
tracing/timer: Add missing hrtimer modes to decode_hrtimer_mode().
irqchip/jcore-aic: Fix missing allocation of IRQ descriptors
irqchip/jcore-aic: Kill use of irq_create_strict_mappings()
md/raid10: fix io loss while replacement replace rdev
md/raid10: fix null-ptr-deref of mreplace in raid10_sync_request
md/raid10: fix wrong setting of max_corr_read_errors
md/raid10: fix overflow of md/safe_mode_delay
md/raid10: check slab-out-of-bounds in md_bitmap_get_counter
x86/resctrl: Only show tasks' pid in current pid namespace
x86/resctrl: Use is_closid_match() in more places
bgmac: fix *initial* chip reset to support BCM5358
drm/amdgpu: Validate VM ioctl flags.
scripts/tags.sh: Resolve gtags empty index generation
drm/i915: Initialise outparam for error return from wait_for_register
HID: wacom: Use ktime_t rather than int when dealing with timestamps
fbdev: imsttfb: Fix use after free bug in imsttfb_probe
video: imsttfb: check for ioremap() failures
x86/smp: Use dedicated cache-line for mwait_play_dead()
gfs2: Don't deref jdesc in evict
Linux 5.4.250
x86/cpu/amd: Add a Zenbleed fix
x86/cpu/amd: Move the errata checking functionality up
x86/microcode/AMD: Load late on both threads too
Conflicts:
drivers/usb/dwc3/gadget.c
Change-Id: Ibd4bab8255496e4640f2eaf4eb7836209dd7cbfb
2229 lines
58 KiB
C
2229 lines
58 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
/*
|
||
* USB Network driver infrastructure
|
||
* Copyright (C) 2000-2005 by David Brownell
|
||
* Copyright (C) 2003-2005 David Hollis <dhollis@davehollis.com>
|
||
*/
|
||
|
||
/*
|
||
* This is a generic "USB networking" framework that works with several
|
||
* kinds of full and high speed networking devices: host-to-host cables,
|
||
* smart usb peripherals, and actual Ethernet adapters.
|
||
*
|
||
* These devices usually differ in terms of control protocols (if they
|
||
* even have one!) and sometimes they define new framing to wrap or batch
|
||
* Ethernet packets. Otherwise, they talk to USB pretty much the same,
|
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* so interface (un)binding, endpoint I/O queues, fault handling, and other
|
||
* issues can usefully be addressed by this framework.
|
||
*/
|
||
|
||
// #define DEBUG // error path messages, extra info
|
||
// #define VERBOSE // more; success messages
|
||
|
||
#include <linux/module.h>
|
||
#include <linux/init.h>
|
||
#include <linux/netdevice.h>
|
||
#include <linux/etherdevice.h>
|
||
#include <linux/ctype.h>
|
||
#include <linux/ethtool.h>
|
||
#include <linux/workqueue.h>
|
||
#include <linux/mii.h>
|
||
#include <linux/usb.h>
|
||
#include <linux/usb/usbnet.h>
|
||
#include <linux/slab.h>
|
||
#include <linux/kernel.h>
|
||
#include <linux/pm_runtime.h>
|
||
|
||
#define DRIVER_VERSION "22-Aug-2005"
|
||
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
/*
|
||
* Nineteen USB 1.1 max size bulk transactions per frame (ms), max.
|
||
* Several dozen bytes of IPv4 data can fit in two such transactions.
|
||
* One maximum size Ethernet packet takes twenty four of them.
|
||
* For high speed, each frame comfortably fits almost 36 max size
|
||
* Ethernet packets (so queues should be bigger).
|
||
*
|
||
* The goal is to let the USB host controller be busy for 5msec or
|
||
* more before an irq is required, under load. Jumbograms change
|
||
* the equation.
|
||
*/
|
||
#define MAX_QUEUE_MEMORY (60 * 1518)
|
||
#define RX_QLEN(dev) ((dev)->rx_qlen)
|
||
#define TX_QLEN(dev) ((dev)->tx_qlen)
|
||
|
||
// reawaken network queue this soon after stopping; else watchdog barks
|
||
#define TX_TIMEOUT_JIFFIES (5*HZ)
|
||
|
||
/* throttle rx/tx briefly after some faults, so hub_wq might disconnect()
|
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* us (it polls at HZ/4 usually) before we report too many false errors.
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*/
|
||
#define THROTTLE_JIFFIES (HZ/8)
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|
||
// between wakeups
|
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#define UNLINK_TIMEOUT_MS 3
|
||
|
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/*-------------------------------------------------------------------------*/
|
||
|
||
// randomly generated ethernet address
|
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static u8 node_id [ETH_ALEN];
|
||
|
||
/* use ethtool to change the level for any given device */
|
||
static int msg_level = -1;
|
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module_param (msg_level, int, 0);
|
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MODULE_PARM_DESC (msg_level, "Override default message level");
|
||
|
||
static int usb0_rx_skb_threshold = 500;
|
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module_param(usb0_rx_skb_threshold, int, 0644);
|
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MODULE_PARM_DESC(usb0_rx_skb_threshold, "Throttle rx traffic in USB3");
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
/* handles CDC Ethernet and many other network "bulk data" interfaces */
|
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int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf)
|
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{
|
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int tmp;
|
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struct usb_host_interface *alt = NULL;
|
||
struct usb_host_endpoint *in = NULL, *out = NULL;
|
||
struct usb_host_endpoint *status = NULL;
|
||
|
||
for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
|
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unsigned ep;
|
||
|
||
in = out = status = NULL;
|
||
alt = intf->altsetting + tmp;
|
||
|
||
/* take the first altsetting with in-bulk + out-bulk;
|
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* remember any status endpoint, just in case;
|
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* ignore other endpoints and altsettings.
|
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*/
|
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for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
|
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struct usb_host_endpoint *e;
|
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int intr = 0;
|
||
|
||
e = alt->endpoint + ep;
|
||
|
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/* ignore endpoints which cannot transfer data */
|
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if (!usb_endpoint_maxp(&e->desc))
|
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continue;
|
||
|
||
switch (e->desc.bmAttributes) {
|
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case USB_ENDPOINT_XFER_INT:
|
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if (!usb_endpoint_dir_in(&e->desc))
|
||
continue;
|
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intr = 1;
|
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/* FALLTHROUGH */
|
||
case USB_ENDPOINT_XFER_BULK:
|
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break;
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default:
|
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continue;
|
||
}
|
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if (usb_endpoint_dir_in(&e->desc)) {
|
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if (!intr && !in)
|
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in = e;
|
||
else if (intr && !status)
|
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status = e;
|
||
} else {
|
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if (!out)
|
||
out = e;
|
||
}
|
||
}
|
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if (in && out)
|
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break;
|
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}
|
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if (!alt || !in || !out)
|
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return -EINVAL;
|
||
|
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if (alt->desc.bAlternateSetting != 0 ||
|
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!(dev->driver_info->flags & FLAG_NO_SETINT)) {
|
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tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber,
|
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alt->desc.bAlternateSetting);
|
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if (tmp < 0)
|
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return tmp;
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}
|
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|
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dev->in = usb_rcvbulkpipe (dev->udev,
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in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
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dev->out = usb_sndbulkpipe (dev->udev,
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out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
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dev->status = status;
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return 0;
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}
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EXPORT_SYMBOL_GPL(usbnet_get_endpoints);
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int usbnet_get_ethernet_addr(struct usbnet *dev, int iMACAddress)
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{
|
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int tmp = -1, ret;
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unsigned char buf [13];
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ret = usb_string(dev->udev, iMACAddress, buf, sizeof buf);
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if (ret == 12)
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tmp = hex2bin(dev->net->dev_addr, buf, 6);
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if (tmp < 0) {
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dev_dbg(&dev->udev->dev,
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"bad MAC string %d fetch, %d\n", iMACAddress, tmp);
|
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if (ret >= 0)
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ret = -EINVAL;
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return ret;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(usbnet_get_ethernet_addr);
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static void intr_complete (struct urb *urb)
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{
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struct usbnet *dev = urb->context;
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int status = urb->status;
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|
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switch (status) {
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/* success */
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case 0:
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dev->driver_info->status(dev, urb);
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break;
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|
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/* software-driven interface shutdown */
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case -ENOENT: /* urb killed */
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case -ESHUTDOWN: /* hardware gone */
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netif_dbg(dev, ifdown, dev->net,
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"intr shutdown, code %d\n", status);
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return;
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|
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/* NOTE: not throttling like RX/TX, since this endpoint
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* already polls infrequently
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*/
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default:
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netdev_dbg(dev->net, "intr status %d\n", status);
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break;
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}
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|
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status = usb_submit_urb (urb, GFP_ATOMIC);
|
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if (status != 0)
|
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netif_err(dev, timer, dev->net,
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"intr resubmit --> %d\n", status);
|
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}
|
||
|
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static int init_status (struct usbnet *dev, struct usb_interface *intf)
|
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{
|
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char *buf = NULL;
|
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unsigned pipe = 0;
|
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unsigned maxp;
|
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unsigned period;
|
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|
||
if (!dev->driver_info->status)
|
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return 0;
|
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|
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pipe = usb_rcvintpipe (dev->udev,
|
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dev->status->desc.bEndpointAddress
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& USB_ENDPOINT_NUMBER_MASK);
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maxp = usb_maxpacket (dev->udev, pipe, 0);
|
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|
||
/* avoid 1 msec chatter: min 8 msec poll rate */
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period = max ((int) dev->status->desc.bInterval,
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(dev->udev->speed == USB_SPEED_HIGH) ? 7 : 3);
|
||
|
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buf = kmalloc (maxp, GFP_KERNEL);
|
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if (buf) {
|
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dev->interrupt = usb_alloc_urb (0, GFP_KERNEL);
|
||
if (!dev->interrupt) {
|
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kfree (buf);
|
||
return -ENOMEM;
|
||
} else {
|
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usb_fill_int_urb(dev->interrupt, dev->udev, pipe,
|
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buf, maxp, intr_complete, dev, period);
|
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dev->interrupt->transfer_flags |= URB_FREE_BUFFER;
|
||
dev_dbg(&intf->dev,
|
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"status ep%din, %d bytes period %d\n",
|
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usb_pipeendpoint(pipe), maxp, period);
|
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}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Submit the interrupt URB if not previously submitted, increasing refcount */
|
||
int usbnet_status_start(struct usbnet *dev, gfp_t mem_flags)
|
||
{
|
||
int ret = 0;
|
||
|
||
WARN_ON_ONCE(dev->interrupt == NULL);
|
||
if (dev->interrupt) {
|
||
mutex_lock(&dev->interrupt_mutex);
|
||
|
||
if (++dev->interrupt_count == 1)
|
||
ret = usb_submit_urb(dev->interrupt, mem_flags);
|
||
|
||
dev_dbg(&dev->udev->dev, "incremented interrupt URB count to %d\n",
|
||
dev->interrupt_count);
|
||
mutex_unlock(&dev->interrupt_mutex);
|
||
}
|
||
return ret;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_status_start);
|
||
|
||
/* For resume; submit interrupt URB if previously submitted */
|
||
static int __usbnet_status_start_force(struct usbnet *dev, gfp_t mem_flags)
|
||
{
|
||
int ret = 0;
|
||
|
||
mutex_lock(&dev->interrupt_mutex);
|
||
if (dev->interrupt_count) {
|
||
ret = usb_submit_urb(dev->interrupt, mem_flags);
|
||
dev_dbg(&dev->udev->dev,
|
||
"submitted interrupt URB for resume\n");
|
||
}
|
||
mutex_unlock(&dev->interrupt_mutex);
|
||
return ret;
|
||
}
|
||
|
||
/* Kill the interrupt URB if all submitters want it killed */
|
||
void usbnet_status_stop(struct usbnet *dev)
|
||
{
|
||
if (dev->interrupt) {
|
||
mutex_lock(&dev->interrupt_mutex);
|
||
WARN_ON(dev->interrupt_count == 0);
|
||
|
||
if (dev->interrupt_count && --dev->interrupt_count == 0)
|
||
usb_kill_urb(dev->interrupt);
|
||
|
||
dev_dbg(&dev->udev->dev,
|
||
"decremented interrupt URB count to %d\n",
|
||
dev->interrupt_count);
|
||
mutex_unlock(&dev->interrupt_mutex);
|
||
}
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_status_stop);
|
||
|
||
/* For suspend; always kill interrupt URB */
|
||
static void __usbnet_status_stop_force(struct usbnet *dev)
|
||
{
|
||
if (dev->interrupt) {
|
||
mutex_lock(&dev->interrupt_mutex);
|
||
usb_kill_urb(dev->interrupt);
|
||
dev_dbg(&dev->udev->dev, "killed interrupt URB for suspend\n");
|
||
mutex_unlock(&dev->interrupt_mutex);
|
||
}
|
||
}
|
||
|
||
/* Passes this packet up the stack, updating its accounting.
|
||
* Some link protocols batch packets, so their rx_fixup paths
|
||
* can return clones as well as just modify the original skb.
|
||
*/
|
||
void usbnet_skb_return (struct usbnet *dev, struct sk_buff *skb)
|
||
{
|
||
struct pcpu_sw_netstats *stats64 = this_cpu_ptr(dev->stats64);
|
||
unsigned long flags;
|
||
int status;
|
||
|
||
if (test_bit(EVENT_RX_PAUSED, &dev->flags)) {
|
||
skb_queue_tail(&dev->rxq_pause, skb);
|
||
return;
|
||
}
|
||
|
||
/* only update if unset to allow minidriver rx_fixup override */
|
||
if (skb->protocol == 0)
|
||
skb->protocol = eth_type_trans (skb, dev->net);
|
||
|
||
flags = u64_stats_update_begin_irqsave(&stats64->syncp);
|
||
stats64->rx_packets++;
|
||
stats64->rx_bytes += skb->len;
|
||
u64_stats_update_end_irqrestore(&stats64->syncp, flags);
|
||
|
||
netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n",
|
||
skb->len + sizeof (struct ethhdr), skb->protocol);
|
||
memset (skb->cb, 0, sizeof (struct skb_data));
|
||
|
||
if (skb_defer_rx_timestamp(skb))
|
||
return;
|
||
|
||
status = netif_rx (skb);
|
||
if (status != NET_RX_SUCCESS)
|
||
netif_dbg(dev, rx_err, dev->net,
|
||
"netif_rx status %d\n", status);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_skb_return);
|
||
|
||
/* must be called if hard_mtu or rx_urb_size changed */
|
||
void usbnet_update_max_qlen(struct usbnet *dev)
|
||
{
|
||
enum usb_device_speed speed = dev->udev->speed;
|
||
|
||
if (!dev->rx_urb_size || !dev->hard_mtu)
|
||
goto insanity;
|
||
switch (speed) {
|
||
case USB_SPEED_HIGH:
|
||
dev->rx_qlen = MAX_QUEUE_MEMORY / dev->rx_urb_size;
|
||
dev->tx_qlen = MAX_QUEUE_MEMORY / dev->hard_mtu;
|
||
break;
|
||
case USB_SPEED_SUPER:
|
||
case USB_SPEED_SUPER_PLUS:
|
||
/*
|
||
* Not take default 5ms qlen for super speed HC to
|
||
* save memory, and iperf tests show 2.5ms qlen can
|
||
* work well
|
||
*/
|
||
dev->rx_qlen = 5 * MAX_QUEUE_MEMORY / dev->rx_urb_size;
|
||
dev->tx_qlen = 5 * MAX_QUEUE_MEMORY / dev->hard_mtu;
|
||
break;
|
||
default:
|
||
insanity:
|
||
dev->rx_qlen = dev->tx_qlen = 4;
|
||
}
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_update_max_qlen);
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
*
|
||
* Network Device Driver (peer link to "Host Device", from USB host)
|
||
*
|
||
*-------------------------------------------------------------------------*/
|
||
|
||
int usbnet_change_mtu (struct net_device *net, int new_mtu)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
int ll_mtu = new_mtu + net->hard_header_len;
|
||
int old_hard_mtu = dev->hard_mtu;
|
||
int old_rx_urb_size = dev->rx_urb_size;
|
||
|
||
// no second zero-length packet read wanted after mtu-sized packets
|
||
if ((ll_mtu % dev->maxpacket) == 0)
|
||
return -EDOM;
|
||
net->mtu = new_mtu;
|
||
|
||
dev->hard_mtu = net->mtu + net->hard_header_len;
|
||
if (dev->rx_urb_size == old_hard_mtu) {
|
||
dev->rx_urb_size = dev->hard_mtu;
|
||
if (dev->rx_urb_size > old_rx_urb_size) {
|
||
usbnet_pause_rx(dev);
|
||
usbnet_unlink_rx_urbs(dev);
|
||
usbnet_resume_rx(dev);
|
||
}
|
||
}
|
||
|
||
/* max qlen depend on hard_mtu and rx_urb_size */
|
||
usbnet_update_max_qlen(dev);
|
||
|
||
return 0;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_change_mtu);
|
||
|
||
/* The caller must hold list->lock */
|
||
static void __usbnet_queue_skb(struct sk_buff_head *list,
|
||
struct sk_buff *newsk, enum skb_state state)
|
||
{
|
||
struct skb_data *entry = (struct skb_data *) newsk->cb;
|
||
|
||
__skb_queue_tail(list, newsk);
|
||
entry->state = state;
|
||
}
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
/* some LK 2.4 HCDs oopsed if we freed or resubmitted urbs from
|
||
* completion callbacks. 2.5 should have fixed those bugs...
|
||
*/
|
||
|
||
static enum skb_state defer_bh(struct usbnet *dev, struct sk_buff *skb,
|
||
struct sk_buff_head *list, enum skb_state state)
|
||
{
|
||
unsigned long flags;
|
||
enum skb_state old_state;
|
||
struct skb_data *entry = (struct skb_data *) skb->cb;
|
||
|
||
spin_lock_irqsave(&list->lock, flags);
|
||
old_state = entry->state;
|
||
entry->state = state;
|
||
__skb_unlink(skb, list);
|
||
|
||
/* defer_bh() is never called with list == &dev->done.
|
||
* spin_lock_nested() tells lockdep that it is OK to take
|
||
* dev->done.lock here with list->lock held.
|
||
*/
|
||
spin_lock_nested(&dev->done.lock, SINGLE_DEPTH_NESTING);
|
||
|
||
__skb_queue_tail(&dev->done, skb);
|
||
if (dev->done.qlen == 1)
|
||
tasklet_schedule(&dev->bh);
|
||
spin_unlock(&dev->done.lock);
|
||
spin_unlock_irqrestore(&list->lock, flags);
|
||
return old_state;
|
||
}
|
||
|
||
/* some work can't be done in tasklets, so we use keventd
|
||
*
|
||
* NOTE: annoying asymmetry: if it's active, schedule_work() fails,
|
||
* but tasklet_schedule() doesn't. hope the failure is rare.
|
||
*/
|
||
void usbnet_defer_kevent (struct usbnet *dev, int work)
|
||
{
|
||
set_bit (work, &dev->flags);
|
||
if (!schedule_work (&dev->kevent))
|
||
netdev_dbg(dev->net, "kevent %d may have been dropped\n", work);
|
||
else
|
||
netdev_dbg(dev->net, "kevent %d scheduled\n", work);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_defer_kevent);
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static void rx_complete (struct urb *urb);
|
||
|
||
static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags)
|
||
{
|
||
struct sk_buff *skb;
|
||
struct skb_data *entry;
|
||
int retval = 0;
|
||
unsigned long lockflags;
|
||
size_t size = dev->rx_urb_size;
|
||
|
||
/* prevent rx skb allocation when error ratio is high */
|
||
if (test_bit(EVENT_RX_KILL, &dev->flags)) {
|
||
usb_free_urb(urb);
|
||
return -ENOLINK;
|
||
}
|
||
|
||
if (test_bit(EVENT_NO_IP_ALIGN, &dev->flags))
|
||
skb = __netdev_alloc_skb(dev->net, size, flags);
|
||
else
|
||
skb = __netdev_alloc_skb_ip_align(dev->net, size, flags);
|
||
if (!skb) {
|
||
netif_dbg(dev, rx_err, dev->net, "no rx skb\n");
|
||
usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
|
||
usb_free_urb (urb);
|
||
return -ENOMEM;
|
||
}
|
||
|
||
entry = (struct skb_data *) skb->cb;
|
||
entry->urb = urb;
|
||
entry->dev = dev;
|
||
entry->length = 0;
|
||
|
||
usb_fill_bulk_urb (urb, dev->udev, dev->in,
|
||
skb->data, size, rx_complete, skb);
|
||
|
||
spin_lock_irqsave (&dev->rxq.lock, lockflags);
|
||
|
||
if (netif_running (dev->net) &&
|
||
netif_device_present (dev->net) &&
|
||
test_bit(EVENT_DEV_OPEN, &dev->flags) &&
|
||
!test_bit (EVENT_RX_HALT, &dev->flags) &&
|
||
!test_bit (EVENT_DEV_ASLEEP, &dev->flags)) {
|
||
switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) {
|
||
case -EPIPE:
|
||
usbnet_defer_kevent (dev, EVENT_RX_HALT);
|
||
break;
|
||
case -ENOMEM:
|
||
usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
|
||
break;
|
||
case -ENODEV:
|
||
netif_dbg(dev, ifdown, dev->net, "device gone\n");
|
||
netif_device_detach (dev->net);
|
||
break;
|
||
case -EHOSTUNREACH:
|
||
retval = -ENOLINK;
|
||
break;
|
||
default:
|
||
netif_dbg(dev, rx_err, dev->net,
|
||
"rx submit, %d\n", retval);
|
||
tasklet_schedule (&dev->bh);
|
||
break;
|
||
case 0:
|
||
__usbnet_queue_skb(&dev->rxq, skb, rx_start);
|
||
}
|
||
} else {
|
||
netif_dbg(dev, ifdown, dev->net, "rx: stopped\n");
|
||
retval = -ENOLINK;
|
||
}
|
||
spin_unlock_irqrestore (&dev->rxq.lock, lockflags);
|
||
if (retval) {
|
||
dev_kfree_skb_any (skb);
|
||
usb_free_urb (urb);
|
||
}
|
||
return retval;
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static inline void rx_process (struct usbnet *dev, struct sk_buff *skb)
|
||
{
|
||
if (dev->driver_info->rx_fixup &&
|
||
!dev->driver_info->rx_fixup (dev, skb)) {
|
||
/* With RX_ASSEMBLE, rx_fixup() must update counters */
|
||
if (!(dev->driver_info->flags & FLAG_RX_ASSEMBLE))
|
||
dev->net->stats.rx_errors++;
|
||
goto done;
|
||
}
|
||
// else network stack removes extra byte if we forced a short packet
|
||
|
||
/* all data was already cloned from skb inside the driver */
|
||
if (dev->driver_info->flags & FLAG_MULTI_PACKET)
|
||
goto done;
|
||
|
||
if (skb->len < ETH_HLEN) {
|
||
dev->net->stats.rx_errors++;
|
||
dev->net->stats.rx_length_errors++;
|
||
netif_dbg(dev, rx_err, dev->net, "rx length %d\n", skb->len);
|
||
} else {
|
||
usbnet_skb_return(dev, skb);
|
||
return;
|
||
}
|
||
|
||
done:
|
||
skb_queue_tail(&dev->done, skb);
|
||
}
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static void rx_complete (struct urb *urb)
|
||
{
|
||
struct sk_buff *skb = (struct sk_buff *) urb->context;
|
||
struct skb_data *entry = (struct skb_data *) skb->cb;
|
||
struct usbnet *dev = entry->dev;
|
||
int urb_status = urb->status;
|
||
enum skb_state state;
|
||
|
||
skb_put (skb, urb->actual_length);
|
||
state = rx_done;
|
||
entry->urb = NULL;
|
||
|
||
switch (urb_status) {
|
||
/* success */
|
||
case 0:
|
||
break;
|
||
|
||
/* stalls need manual reset. this is rare ... except that
|
||
* when going through USB 2.0 TTs, unplug appears this way.
|
||
* we avoid the highspeed version of the ETIMEDOUT/EILSEQ
|
||
* storm, recovering as needed.
|
||
*/
|
||
case -EPIPE:
|
||
dev->net->stats.rx_errors++;
|
||
usbnet_defer_kevent (dev, EVENT_RX_HALT);
|
||
// FALLTHROUGH
|
||
|
||
/* software-driven interface shutdown */
|
||
case -ECONNRESET: /* async unlink */
|
||
case -ESHUTDOWN: /* hardware gone */
|
||
netif_dbg(dev, ifdown, dev->net,
|
||
"rx shutdown, code %d\n", urb_status);
|
||
goto block;
|
||
|
||
/* we get controller i/o faults during hub_wq disconnect() delays.
|
||
* throttle down resubmits, to avoid log floods; just temporarily,
|
||
* so we still recover when the fault isn't a hub_wq delay.
|
||
*/
|
||
case -EPROTO:
|
||
case -ETIME:
|
||
case -EILSEQ:
|
||
dev->net->stats.rx_errors++;
|
||
if (!timer_pending (&dev->delay)) {
|
||
mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES);
|
||
netif_dbg(dev, link, dev->net,
|
||
"rx throttle %d\n", urb_status);
|
||
}
|
||
block:
|
||
state = rx_cleanup;
|
||
entry->urb = urb;
|
||
urb = NULL;
|
||
break;
|
||
|
||
/* data overrun ... flush fifo? */
|
||
case -EOVERFLOW:
|
||
dev->net->stats.rx_over_errors++;
|
||
// FALLTHROUGH
|
||
|
||
default:
|
||
state = rx_cleanup;
|
||
dev->net->stats.rx_errors++;
|
||
netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status);
|
||
break;
|
||
}
|
||
|
||
/* stop rx if packet error rate is high */
|
||
if (++dev->pkt_cnt > 30) {
|
||
dev->pkt_cnt = 0;
|
||
dev->pkt_err = 0;
|
||
} else {
|
||
if (state == rx_cleanup)
|
||
dev->pkt_err++;
|
||
if (dev->pkt_err > 20)
|
||
set_bit(EVENT_RX_KILL, &dev->flags);
|
||
}
|
||
|
||
state = defer_bh(dev, skb, &dev->rxq, state);
|
||
|
||
if (urb) {
|
||
if (netif_running (dev->net) &&
|
||
!test_bit (EVENT_RX_HALT, &dev->flags) &&
|
||
state != unlink_start) {
|
||
if ((!(dev->driver_info->flags & FLAG_THROTTLE_RX)) ||
|
||
((dev->driver_info->flags & FLAG_THROTTLE_RX) &&
|
||
(dev->done.qlen < usb0_rx_skb_threshold))) {
|
||
rx_submit(dev, urb, GFP_ATOMIC);
|
||
usb_mark_last_busy(dev->udev);
|
||
return;
|
||
}
|
||
}
|
||
usb_free_urb (urb);
|
||
}
|
||
netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n");
|
||
}
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
void usbnet_pause_rx(struct usbnet *dev)
|
||
{
|
||
set_bit(EVENT_RX_PAUSED, &dev->flags);
|
||
|
||
netif_dbg(dev, rx_status, dev->net, "paused rx queue enabled\n");
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_pause_rx);
|
||
|
||
void usbnet_resume_rx(struct usbnet *dev)
|
||
{
|
||
struct sk_buff *skb;
|
||
int num = 0;
|
||
|
||
clear_bit(EVENT_RX_PAUSED, &dev->flags);
|
||
|
||
while ((skb = skb_dequeue(&dev->rxq_pause)) != NULL) {
|
||
usbnet_skb_return(dev, skb);
|
||
num++;
|
||
}
|
||
|
||
tasklet_schedule(&dev->bh);
|
||
|
||
netif_dbg(dev, rx_status, dev->net,
|
||
"paused rx queue disabled, %d skbs requeued\n", num);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_resume_rx);
|
||
|
||
void usbnet_purge_paused_rxq(struct usbnet *dev)
|
||
{
|
||
skb_queue_purge(&dev->rxq_pause);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_purge_paused_rxq);
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
// unlink pending rx/tx; completion handlers do all other cleanup
|
||
|
||
static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q)
|
||
{
|
||
unsigned long flags;
|
||
struct sk_buff *skb;
|
||
int count = 0;
|
||
|
||
spin_lock_irqsave (&q->lock, flags);
|
||
while (!skb_queue_empty(q)) {
|
||
struct skb_data *entry;
|
||
struct urb *urb;
|
||
int retval;
|
||
|
||
skb_queue_walk(q, skb) {
|
||
entry = (struct skb_data *) skb->cb;
|
||
if (entry->state != unlink_start)
|
||
goto found;
|
||
}
|
||
break;
|
||
found:
|
||
entry->state = unlink_start;
|
||
urb = entry->urb;
|
||
|
||
/*
|
||
* Get reference count of the URB to avoid it to be
|
||
* freed during usb_unlink_urb, which may trigger
|
||
* use-after-free problem inside usb_unlink_urb since
|
||
* usb_unlink_urb is always racing with .complete
|
||
* handler(include defer_bh).
|
||
*/
|
||
usb_get_urb(urb);
|
||
spin_unlock_irqrestore(&q->lock, flags);
|
||
// during some PM-driven resume scenarios,
|
||
// these (async) unlinks complete immediately
|
||
retval = usb_unlink_urb (urb);
|
||
if (retval != -EINPROGRESS && retval != 0)
|
||
netdev_dbg(dev->net, "unlink urb err, %d\n", retval);
|
||
else
|
||
count++;
|
||
usb_put_urb(urb);
|
||
spin_lock_irqsave(&q->lock, flags);
|
||
}
|
||
spin_unlock_irqrestore (&q->lock, flags);
|
||
return count;
|
||
}
|
||
|
||
// Flush all pending rx urbs
|
||
// minidrivers may need to do this when the MTU changes
|
||
|
||
void usbnet_unlink_rx_urbs(struct usbnet *dev)
|
||
{
|
||
if (netif_running(dev->net)) {
|
||
(void) unlink_urbs (dev, &dev->rxq);
|
||
tasklet_schedule(&dev->bh);
|
||
}
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_unlink_rx_urbs);
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static void wait_skb_queue_empty(struct sk_buff_head *q)
|
||
{
|
||
unsigned long flags;
|
||
|
||
spin_lock_irqsave(&q->lock, flags);
|
||
while (!skb_queue_empty(q)) {
|
||
spin_unlock_irqrestore(&q->lock, flags);
|
||
schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS));
|
||
set_current_state(TASK_UNINTERRUPTIBLE);
|
||
spin_lock_irqsave(&q->lock, flags);
|
||
}
|
||
spin_unlock_irqrestore(&q->lock, flags);
|
||
}
|
||
|
||
// precondition: never called in_interrupt
|
||
static void usbnet_terminate_urbs(struct usbnet *dev)
|
||
{
|
||
DECLARE_WAITQUEUE(wait, current);
|
||
int temp;
|
||
|
||
/* ensure there are no more active urbs */
|
||
add_wait_queue(&dev->wait, &wait);
|
||
set_current_state(TASK_UNINTERRUPTIBLE);
|
||
temp = unlink_urbs(dev, &dev->txq) +
|
||
unlink_urbs(dev, &dev->rxq);
|
||
|
||
/* maybe wait for deletions to finish. */
|
||
wait_skb_queue_empty(&dev->rxq);
|
||
wait_skb_queue_empty(&dev->txq);
|
||
wait_skb_queue_empty(&dev->done);
|
||
netif_dbg(dev, ifdown, dev->net,
|
||
"waited for %d urb completions\n", temp);
|
||
set_current_state(TASK_RUNNING);
|
||
remove_wait_queue(&dev->wait, &wait);
|
||
}
|
||
|
||
int usbnet_stop (struct net_device *net)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
const struct driver_info *info = dev->driver_info;
|
||
int retval, pm, mpn;
|
||
|
||
clear_bit(EVENT_DEV_OPEN, &dev->flags);
|
||
netif_stop_queue (net);
|
||
|
||
netif_info(dev, ifdown, dev->net,
|
||
"stop stats: rx/tx %lu/%lu, errs %lu/%lu\n",
|
||
net->stats.rx_packets, net->stats.tx_packets,
|
||
net->stats.rx_errors, net->stats.tx_errors);
|
||
|
||
/* to not race resume */
|
||
pm = usb_autopm_get_interface(dev->intf);
|
||
/* allow minidriver to stop correctly (wireless devices to turn off
|
||
* radio etc) */
|
||
if (info->stop) {
|
||
retval = info->stop(dev);
|
||
if (retval < 0)
|
||
netif_info(dev, ifdown, dev->net,
|
||
"stop fail (%d) usbnet usb-%s-%s, %s\n",
|
||
retval,
|
||
dev->udev->bus->bus_name, dev->udev->devpath,
|
||
info->description);
|
||
}
|
||
|
||
if (!(info->flags & FLAG_AVOID_UNLINK_URBS))
|
||
usbnet_terminate_urbs(dev);
|
||
|
||
usbnet_status_stop(dev);
|
||
|
||
usbnet_purge_paused_rxq(dev);
|
||
|
||
mpn = !test_and_clear_bit(EVENT_NO_RUNTIME_PM, &dev->flags);
|
||
|
||
/* deferred work (timer, softirq, task) must also stop */
|
||
dev->flags = 0;
|
||
del_timer_sync (&dev->delay);
|
||
tasklet_kill (&dev->bh);
|
||
cancel_work_sync(&dev->kevent);
|
||
if (!pm)
|
||
usb_autopm_put_interface(dev->intf);
|
||
|
||
if (info->manage_power && mpn)
|
||
info->manage_power(dev, 0);
|
||
else
|
||
usb_autopm_put_interface(dev->intf);
|
||
|
||
return 0;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_stop);
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
// posts reads, and enables write queuing
|
||
|
||
// precondition: never called in_interrupt
|
||
|
||
int usbnet_open (struct net_device *net)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
int retval;
|
||
const struct driver_info *info = dev->driver_info;
|
||
|
||
if ((retval = usb_autopm_get_interface(dev->intf)) < 0) {
|
||
netif_info(dev, ifup, dev->net,
|
||
"resumption fail (%d) usbnet usb-%s-%s, %s\n",
|
||
retval,
|
||
dev->udev->bus->bus_name,
|
||
dev->udev->devpath,
|
||
info->description);
|
||
goto done_nopm;
|
||
}
|
||
|
||
// put into "known safe" state
|
||
if (info->reset && (retval = info->reset (dev)) < 0) {
|
||
netif_info(dev, ifup, dev->net,
|
||
"open reset fail (%d) usbnet usb-%s-%s, %s\n",
|
||
retval,
|
||
dev->udev->bus->bus_name,
|
||
dev->udev->devpath,
|
||
info->description);
|
||
goto done;
|
||
}
|
||
|
||
/* hard_mtu or rx_urb_size may change in reset() */
|
||
usbnet_update_max_qlen(dev);
|
||
|
||
// insist peer be connected
|
||
if (info->check_connect && (retval = info->check_connect (dev)) < 0) {
|
||
netif_dbg(dev, ifup, dev->net, "can't open; %d\n", retval);
|
||
goto done;
|
||
}
|
||
|
||
/* start any status interrupt transfer */
|
||
if (dev->interrupt) {
|
||
retval = usbnet_status_start(dev, GFP_KERNEL);
|
||
if (retval < 0) {
|
||
netif_err(dev, ifup, dev->net,
|
||
"intr submit %d\n", retval);
|
||
goto done;
|
||
}
|
||
}
|
||
|
||
set_bit(EVENT_DEV_OPEN, &dev->flags);
|
||
netif_start_queue (net);
|
||
netif_info(dev, ifup, dev->net,
|
||
"open: enable queueing (rx %d, tx %d) mtu %d %s framing\n",
|
||
(int)RX_QLEN(dev), (int)TX_QLEN(dev),
|
||
dev->net->mtu,
|
||
(dev->driver_info->flags & FLAG_FRAMING_NC) ? "NetChip" :
|
||
(dev->driver_info->flags & FLAG_FRAMING_GL) ? "GeneSys" :
|
||
(dev->driver_info->flags & FLAG_FRAMING_Z) ? "Zaurus" :
|
||
(dev->driver_info->flags & FLAG_FRAMING_RN) ? "RNDIS" :
|
||
(dev->driver_info->flags & FLAG_FRAMING_AX) ? "ASIX" :
|
||
"simple");
|
||
|
||
/* reset rx error state */
|
||
dev->pkt_cnt = 0;
|
||
dev->pkt_err = 0;
|
||
clear_bit(EVENT_RX_KILL, &dev->flags);
|
||
|
||
// delay posting reads until we're fully open
|
||
tasklet_schedule (&dev->bh);
|
||
if (info->manage_power) {
|
||
retval = info->manage_power(dev, 1);
|
||
if (retval < 0) {
|
||
retval = 0;
|
||
set_bit(EVENT_NO_RUNTIME_PM, &dev->flags);
|
||
} else {
|
||
usb_autopm_put_interface(dev->intf);
|
||
}
|
||
}
|
||
return retval;
|
||
done:
|
||
usb_autopm_put_interface(dev->intf);
|
||
done_nopm:
|
||
return retval;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_open);
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
/* ethtool methods; minidrivers may need to add some more, but
|
||
* they'll probably want to use this base set.
|
||
*/
|
||
|
||
int usbnet_get_link_ksettings(struct net_device *net,
|
||
struct ethtool_link_ksettings *cmd)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
|
||
if (!dev->mii.mdio_read)
|
||
return -EOPNOTSUPP;
|
||
|
||
mii_ethtool_get_link_ksettings(&dev->mii, cmd);
|
||
|
||
return 0;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_get_link_ksettings);
|
||
|
||
int usbnet_set_link_ksettings(struct net_device *net,
|
||
const struct ethtool_link_ksettings *cmd)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
int retval;
|
||
|
||
if (!dev->mii.mdio_write)
|
||
return -EOPNOTSUPP;
|
||
|
||
retval = mii_ethtool_set_link_ksettings(&dev->mii, cmd);
|
||
|
||
/* link speed/duplex might have changed */
|
||
if (dev->driver_info->link_reset)
|
||
dev->driver_info->link_reset(dev);
|
||
|
||
/* hard_mtu or rx_urb_size may change in link_reset() */
|
||
usbnet_update_max_qlen(dev);
|
||
|
||
return retval;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_set_link_ksettings);
|
||
|
||
void usbnet_get_stats64(struct net_device *net, struct rtnl_link_stats64 *stats)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
unsigned int start;
|
||
int cpu;
|
||
|
||
netdev_stats_to_stats64(stats, &net->stats);
|
||
|
||
for_each_possible_cpu(cpu) {
|
||
struct pcpu_sw_netstats *stats64;
|
||
u64 rx_packets, rx_bytes;
|
||
u64 tx_packets, tx_bytes;
|
||
|
||
stats64 = per_cpu_ptr(dev->stats64, cpu);
|
||
|
||
do {
|
||
start = u64_stats_fetch_begin_irq(&stats64->syncp);
|
||
rx_packets = stats64->rx_packets;
|
||
rx_bytes = stats64->rx_bytes;
|
||
tx_packets = stats64->tx_packets;
|
||
tx_bytes = stats64->tx_bytes;
|
||
} while (u64_stats_fetch_retry_irq(&stats64->syncp, start));
|
||
|
||
stats->rx_packets += rx_packets;
|
||
stats->rx_bytes += rx_bytes;
|
||
stats->tx_packets += tx_packets;
|
||
stats->tx_bytes += tx_bytes;
|
||
}
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_get_stats64);
|
||
|
||
u32 usbnet_get_link (struct net_device *net)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
|
||
/* If a check_connect is defined, return its result */
|
||
if (dev->driver_info->check_connect)
|
||
return dev->driver_info->check_connect (dev) == 0;
|
||
|
||
/* if the device has mii operations, use those */
|
||
if (dev->mii.mdio_read)
|
||
return mii_link_ok(&dev->mii);
|
||
|
||
/* Otherwise, dtrt for drivers calling netif_carrier_{on,off} */
|
||
return ethtool_op_get_link(net);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_get_link);
|
||
|
||
int usbnet_nway_reset(struct net_device *net)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
|
||
if (!dev->mii.mdio_write)
|
||
return -EOPNOTSUPP;
|
||
|
||
return mii_nway_restart(&dev->mii);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_nway_reset);
|
||
|
||
void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
|
||
strlcpy (info->driver, dev->driver_name, sizeof info->driver);
|
||
strlcpy (info->version, DRIVER_VERSION, sizeof info->version);
|
||
strlcpy (info->fw_version, dev->driver_info->description,
|
||
sizeof info->fw_version);
|
||
usb_make_path (dev->udev, info->bus_info, sizeof info->bus_info);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_get_drvinfo);
|
||
|
||
u32 usbnet_get_msglevel (struct net_device *net)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
|
||
return dev->msg_enable;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_get_msglevel);
|
||
|
||
void usbnet_set_msglevel (struct net_device *net, u32 level)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
|
||
dev->msg_enable = level;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_set_msglevel);
|
||
|
||
/* drivers may override default ethtool_ops in their bind() routine */
|
||
static const struct ethtool_ops usbnet_ethtool_ops = {
|
||
.get_link = usbnet_get_link,
|
||
.nway_reset = usbnet_nway_reset,
|
||
.get_drvinfo = usbnet_get_drvinfo,
|
||
.get_msglevel = usbnet_get_msglevel,
|
||
.set_msglevel = usbnet_set_msglevel,
|
||
.get_ts_info = ethtool_op_get_ts_info,
|
||
.get_link_ksettings = usbnet_get_link_ksettings,
|
||
.set_link_ksettings = usbnet_set_link_ksettings,
|
||
};
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static void __handle_link_change(struct usbnet *dev)
|
||
{
|
||
if (!test_bit(EVENT_DEV_OPEN, &dev->flags))
|
||
return;
|
||
|
||
if (!netif_carrier_ok(dev->net)) {
|
||
/* kill URBs for reading packets to save bus bandwidth */
|
||
unlink_urbs(dev, &dev->rxq);
|
||
|
||
/*
|
||
* tx_timeout will unlink URBs for sending packets and
|
||
* tx queue is stopped by netcore after link becomes off
|
||
*/
|
||
} else {
|
||
/* submitting URBs for reading packets */
|
||
tasklet_schedule(&dev->bh);
|
||
}
|
||
|
||
/* hard_mtu or rx_urb_size may change during link change */
|
||
usbnet_update_max_qlen(dev);
|
||
|
||
clear_bit(EVENT_LINK_CHANGE, &dev->flags);
|
||
}
|
||
|
||
static void usbnet_set_rx_mode(struct net_device *net)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
|
||
usbnet_defer_kevent(dev, EVENT_SET_RX_MODE);
|
||
}
|
||
|
||
static void __handle_set_rx_mode(struct usbnet *dev)
|
||
{
|
||
if (dev->driver_info->set_rx_mode)
|
||
(dev->driver_info->set_rx_mode)(dev);
|
||
|
||
clear_bit(EVENT_SET_RX_MODE, &dev->flags);
|
||
}
|
||
|
||
/* work that cannot be done in interrupt context uses keventd.
|
||
*
|
||
* NOTE: with 2.5 we could do more of this using completion callbacks,
|
||
* especially now that control transfers can be queued.
|
||
*/
|
||
static void
|
||
usbnet_deferred_kevent (struct work_struct *work)
|
||
{
|
||
struct usbnet *dev =
|
||
container_of(work, struct usbnet, kevent);
|
||
int status;
|
||
|
||
/* usb_clear_halt() needs a thread context */
|
||
if (test_bit (EVENT_TX_HALT, &dev->flags)) {
|
||
unlink_urbs (dev, &dev->txq);
|
||
status = usb_autopm_get_interface(dev->intf);
|
||
if (status < 0)
|
||
goto fail_pipe;
|
||
status = usb_clear_halt (dev->udev, dev->out);
|
||
usb_autopm_put_interface(dev->intf);
|
||
if (status < 0 &&
|
||
status != -EPIPE &&
|
||
status != -ESHUTDOWN) {
|
||
if (netif_msg_tx_err (dev))
|
||
fail_pipe:
|
||
netdev_err(dev->net, "can't clear tx halt, status %d\n",
|
||
status);
|
||
} else {
|
||
clear_bit (EVENT_TX_HALT, &dev->flags);
|
||
if (status != -ESHUTDOWN)
|
||
netif_wake_queue (dev->net);
|
||
}
|
||
}
|
||
if (test_bit (EVENT_RX_HALT, &dev->flags)) {
|
||
unlink_urbs (dev, &dev->rxq);
|
||
status = usb_autopm_get_interface(dev->intf);
|
||
if (status < 0)
|
||
goto fail_halt;
|
||
status = usb_clear_halt (dev->udev, dev->in);
|
||
usb_autopm_put_interface(dev->intf);
|
||
if (status < 0 &&
|
||
status != -EPIPE &&
|
||
status != -ESHUTDOWN) {
|
||
if (netif_msg_rx_err (dev))
|
||
fail_halt:
|
||
netdev_err(dev->net, "can't clear rx halt, status %d\n",
|
||
status);
|
||
} else {
|
||
clear_bit (EVENT_RX_HALT, &dev->flags);
|
||
tasklet_schedule (&dev->bh);
|
||
}
|
||
}
|
||
|
||
/* tasklet could resubmit itself forever if memory is tight */
|
||
if (test_bit (EVENT_RX_MEMORY, &dev->flags)) {
|
||
struct urb *urb = NULL;
|
||
int resched = 1;
|
||
|
||
if (netif_running (dev->net))
|
||
urb = usb_alloc_urb (0, GFP_KERNEL);
|
||
else
|
||
clear_bit (EVENT_RX_MEMORY, &dev->flags);
|
||
if (urb != NULL) {
|
||
clear_bit (EVENT_RX_MEMORY, &dev->flags);
|
||
status = usb_autopm_get_interface(dev->intf);
|
||
if (status < 0) {
|
||
usb_free_urb(urb);
|
||
goto fail_lowmem;
|
||
}
|
||
if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK)
|
||
resched = 0;
|
||
usb_autopm_put_interface(dev->intf);
|
||
fail_lowmem:
|
||
if (resched)
|
||
tasklet_schedule (&dev->bh);
|
||
}
|
||
}
|
||
|
||
if (test_bit (EVENT_LINK_RESET, &dev->flags)) {
|
||
const struct driver_info *info = dev->driver_info;
|
||
int retval = 0;
|
||
|
||
clear_bit (EVENT_LINK_RESET, &dev->flags);
|
||
status = usb_autopm_get_interface(dev->intf);
|
||
if (status < 0)
|
||
goto skip_reset;
|
||
if(info->link_reset && (retval = info->link_reset(dev)) < 0) {
|
||
usb_autopm_put_interface(dev->intf);
|
||
skip_reset:
|
||
netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n",
|
||
retval,
|
||
dev->udev->bus->bus_name,
|
||
dev->udev->devpath,
|
||
info->description);
|
||
} else {
|
||
usb_autopm_put_interface(dev->intf);
|
||
}
|
||
|
||
/* handle link change from link resetting */
|
||
__handle_link_change(dev);
|
||
}
|
||
|
||
if (test_bit (EVENT_LINK_CHANGE, &dev->flags))
|
||
__handle_link_change(dev);
|
||
|
||
if (test_bit (EVENT_SET_RX_MODE, &dev->flags))
|
||
__handle_set_rx_mode(dev);
|
||
|
||
|
||
if (dev->flags)
|
||
netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags);
|
||
}
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static void tx_complete (struct urb *urb)
|
||
{
|
||
struct sk_buff *skb = (struct sk_buff *) urb->context;
|
||
struct skb_data *entry = (struct skb_data *) skb->cb;
|
||
struct usbnet *dev = entry->dev;
|
||
|
||
if (urb->status == 0) {
|
||
struct pcpu_sw_netstats *stats64 = this_cpu_ptr(dev->stats64);
|
||
unsigned long flags;
|
||
|
||
flags = u64_stats_update_begin_irqsave(&stats64->syncp);
|
||
stats64->tx_packets += entry->packets;
|
||
stats64->tx_bytes += entry->length;
|
||
u64_stats_update_end_irqrestore(&stats64->syncp, flags);
|
||
} else {
|
||
dev->net->stats.tx_errors++;
|
||
|
||
switch (urb->status) {
|
||
case -EPIPE:
|
||
usbnet_defer_kevent (dev, EVENT_TX_HALT);
|
||
break;
|
||
|
||
/* software-driven interface shutdown */
|
||
case -ECONNRESET: // async unlink
|
||
case -ESHUTDOWN: // hardware gone
|
||
break;
|
||
|
||
/* like rx, tx gets controller i/o faults during hub_wq
|
||
* delays and so it uses the same throttling mechanism.
|
||
*/
|
||
case -EPROTO:
|
||
case -ETIME:
|
||
case -EILSEQ:
|
||
usb_mark_last_busy(dev->udev);
|
||
if (!timer_pending (&dev->delay)) {
|
||
mod_timer (&dev->delay,
|
||
jiffies + THROTTLE_JIFFIES);
|
||
netif_dbg(dev, link, dev->net,
|
||
"tx throttle %d\n", urb->status);
|
||
}
|
||
netif_stop_queue (dev->net);
|
||
break;
|
||
default:
|
||
netif_dbg(dev, tx_err, dev->net,
|
||
"tx err %d\n", entry->urb->status);
|
||
break;
|
||
}
|
||
}
|
||
|
||
usb_autopm_put_interface_async(dev->intf);
|
||
(void) defer_bh(dev, skb, &dev->txq, tx_done);
|
||
}
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
void usbnet_tx_timeout (struct net_device *net)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
|
||
unlink_urbs (dev, &dev->txq);
|
||
tasklet_schedule (&dev->bh);
|
||
/* this needs to be handled individually because the generic layer
|
||
* doesn't know what is sufficient and could not restore private
|
||
* information if a remedy of an unconditional reset were used.
|
||
*/
|
||
if (dev->driver_info->recover)
|
||
(dev->driver_info->recover)(dev);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_tx_timeout);
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static int build_dma_sg(const struct sk_buff *skb, struct urb *urb)
|
||
{
|
||
unsigned num_sgs, total_len = 0;
|
||
int i, s = 0;
|
||
|
||
num_sgs = skb_shinfo(skb)->nr_frags + 1;
|
||
if (num_sgs == 1)
|
||
return 0;
|
||
|
||
/* reserve one for zero packet */
|
||
urb->sg = kmalloc_array(num_sgs + 1, sizeof(struct scatterlist),
|
||
GFP_ATOMIC);
|
||
if (!urb->sg)
|
||
return -ENOMEM;
|
||
|
||
urb->num_sgs = num_sgs;
|
||
sg_init_table(urb->sg, urb->num_sgs + 1);
|
||
|
||
sg_set_buf(&urb->sg[s++], skb->data, skb_headlen(skb));
|
||
total_len += skb_headlen(skb);
|
||
|
||
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
|
||
skb_frag_t *f = &skb_shinfo(skb)->frags[i];
|
||
|
||
total_len += skb_frag_size(f);
|
||
sg_set_page(&urb->sg[i + s], skb_frag_page(f), skb_frag_size(f),
|
||
skb_frag_off(f));
|
||
}
|
||
urb->transfer_buffer_length = total_len;
|
||
|
||
return 1;
|
||
}
|
||
|
||
netdev_tx_t usbnet_start_xmit (struct sk_buff *skb,
|
||
struct net_device *net)
|
||
{
|
||
struct usbnet *dev = netdev_priv(net);
|
||
unsigned int length;
|
||
struct urb *urb = NULL;
|
||
struct skb_data *entry;
|
||
const struct driver_info *info = dev->driver_info;
|
||
unsigned long flags;
|
||
int retval;
|
||
|
||
if (skb)
|
||
skb_tx_timestamp(skb);
|
||
|
||
// some devices want funky USB-level framing, for
|
||
// win32 driver (usually) and/or hardware quirks
|
||
if (info->tx_fixup) {
|
||
skb = info->tx_fixup (dev, skb, GFP_ATOMIC);
|
||
if (!skb) {
|
||
/* packet collected; minidriver waiting for more */
|
||
if (info->flags & FLAG_MULTI_PACKET)
|
||
goto not_drop;
|
||
netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n");
|
||
goto drop;
|
||
}
|
||
}
|
||
|
||
if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) {
|
||
netif_dbg(dev, tx_err, dev->net, "no urb\n");
|
||
goto drop;
|
||
}
|
||
|
||
entry = (struct skb_data *) skb->cb;
|
||
entry->urb = urb;
|
||
entry->dev = dev;
|
||
|
||
usb_fill_bulk_urb (urb, dev->udev, dev->out,
|
||
skb->data, skb->len, tx_complete, skb);
|
||
if (dev->can_dma_sg) {
|
||
if (build_dma_sg(skb, urb) < 0)
|
||
goto drop;
|
||
}
|
||
length = urb->transfer_buffer_length;
|
||
|
||
/* don't assume the hardware handles USB_ZERO_PACKET
|
||
* NOTE: strictly conforming cdc-ether devices should expect
|
||
* the ZLP here, but ignore the one-byte packet.
|
||
* NOTE2: CDC NCM specification is different from CDC ECM when
|
||
* handling ZLP/short packets, so cdc_ncm driver will make short
|
||
* packet itself if needed.
|
||
*/
|
||
if (length % dev->maxpacket == 0) {
|
||
if (!(info->flags & FLAG_SEND_ZLP)) {
|
||
if (!(info->flags & FLAG_MULTI_PACKET)) {
|
||
length++;
|
||
if (skb_tailroom(skb) && !urb->num_sgs) {
|
||
skb->data[skb->len] = 0;
|
||
__skb_put(skb, 1);
|
||
} else if (urb->num_sgs)
|
||
sg_set_buf(&urb->sg[urb->num_sgs++],
|
||
dev->padding_pkt, 1);
|
||
}
|
||
} else
|
||
urb->transfer_flags |= URB_ZERO_PACKET;
|
||
}
|
||
urb->transfer_buffer_length = length;
|
||
|
||
if (info->flags & FLAG_MULTI_PACKET) {
|
||
/* Driver has set number of packets and a length delta.
|
||
* Calculate the complete length and ensure that it's
|
||
* positive.
|
||
*/
|
||
entry->length += length;
|
||
if (WARN_ON_ONCE(entry->length <= 0))
|
||
entry->length = length;
|
||
} else {
|
||
usbnet_set_skb_tx_stats(skb, 1, length);
|
||
}
|
||
|
||
spin_lock_irqsave(&dev->txq.lock, flags);
|
||
retval = usb_autopm_get_interface_async(dev->intf);
|
||
if (retval < 0) {
|
||
spin_unlock_irqrestore(&dev->txq.lock, flags);
|
||
goto drop;
|
||
}
|
||
if (netif_queue_stopped(net)) {
|
||
usb_autopm_put_interface_async(dev->intf);
|
||
spin_unlock_irqrestore(&dev->txq.lock, flags);
|
||
goto drop;
|
||
}
|
||
|
||
#ifdef CONFIG_PM
|
||
/* if this triggers the device is still a sleep */
|
||
if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) {
|
||
/* transmission will be done in resume */
|
||
usb_anchor_urb(urb, &dev->deferred);
|
||
/* no use to process more packets */
|
||
netif_stop_queue(net);
|
||
usb_put_urb(urb);
|
||
spin_unlock_irqrestore(&dev->txq.lock, flags);
|
||
netdev_dbg(dev->net, "Delaying transmission for resumption\n");
|
||
goto deferred;
|
||
}
|
||
#endif
|
||
|
||
switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) {
|
||
case -EPIPE:
|
||
netif_stop_queue (net);
|
||
usbnet_defer_kevent (dev, EVENT_TX_HALT);
|
||
usb_autopm_put_interface_async(dev->intf);
|
||
break;
|
||
default:
|
||
usb_autopm_put_interface_async(dev->intf);
|
||
netif_dbg(dev, tx_err, dev->net,
|
||
"tx: submit urb err %d\n", retval);
|
||
break;
|
||
case 0:
|
||
netif_trans_update(net);
|
||
__usbnet_queue_skb(&dev->txq, skb, tx_start);
|
||
if (dev->txq.qlen >= TX_QLEN (dev))
|
||
netif_stop_queue (net);
|
||
}
|
||
spin_unlock_irqrestore (&dev->txq.lock, flags);
|
||
|
||
if (retval) {
|
||
netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval);
|
||
drop:
|
||
dev->net->stats.tx_dropped++;
|
||
not_drop:
|
||
if (skb)
|
||
dev_kfree_skb_any (skb);
|
||
if (urb) {
|
||
kfree(urb->sg);
|
||
usb_free_urb(urb);
|
||
}
|
||
} else
|
||
netif_dbg(dev, tx_queued, dev->net,
|
||
"> tx, len %u, type 0x%x\n", length, skb->protocol);
|
||
#ifdef CONFIG_PM
|
||
deferred:
|
||
#endif
|
||
return NETDEV_TX_OK;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_start_xmit);
|
||
|
||
static int rx_alloc_submit(struct usbnet *dev, gfp_t flags)
|
||
{
|
||
struct urb *urb;
|
||
int i;
|
||
int ret = 0;
|
||
|
||
/* don't refill the queue all at once */
|
||
for (i = 0; i < 10 && dev->rxq.qlen < RX_QLEN(dev); i++) {
|
||
urb = usb_alloc_urb(0, flags);
|
||
if (urb != NULL) {
|
||
ret = rx_submit(dev, urb, flags);
|
||
if (ret)
|
||
goto err;
|
||
} else {
|
||
ret = -ENOMEM;
|
||
goto err;
|
||
}
|
||
}
|
||
err:
|
||
return ret;
|
||
}
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
// tasklet (work deferred from completions, in_irq) or timer
|
||
|
||
static void usbnet_bh (struct timer_list *t)
|
||
{
|
||
struct usbnet *dev = from_timer(dev, t, delay);
|
||
struct sk_buff *skb;
|
||
struct skb_data *entry;
|
||
|
||
while ((skb = skb_dequeue (&dev->done))) {
|
||
entry = (struct skb_data *) skb->cb;
|
||
switch (entry->state) {
|
||
case rx_done:
|
||
entry->state = rx_cleanup;
|
||
rx_process (dev, skb);
|
||
continue;
|
||
case tx_done:
|
||
kfree(entry->urb->sg);
|
||
/* fall through */
|
||
case rx_cleanup:
|
||
usb_free_urb (entry->urb);
|
||
dev_kfree_skb (skb);
|
||
continue;
|
||
default:
|
||
netdev_dbg(dev->net, "bogus skb state %d\n", entry->state);
|
||
}
|
||
}
|
||
|
||
/* restart RX again after disabling due to high error rate */
|
||
clear_bit(EVENT_RX_KILL, &dev->flags);
|
||
|
||
/* waiting for all pending urbs to complete?
|
||
* only then can we forgo submitting anew
|
||
*/
|
||
if (waitqueue_active(&dev->wait)) {
|
||
if (dev->txq.qlen + dev->rxq.qlen + dev->done.qlen == 0)
|
||
wake_up_all(&dev->wait);
|
||
|
||
// or are we maybe short a few urbs?
|
||
} else if (netif_running (dev->net) &&
|
||
netif_device_present (dev->net) &&
|
||
netif_carrier_ok(dev->net) &&
|
||
!timer_pending(&dev->delay) &&
|
||
!test_bit(EVENT_RX_PAUSED, &dev->flags) &&
|
||
!test_bit(EVENT_RX_HALT, &dev->flags)) {
|
||
int temp = dev->rxq.qlen;
|
||
|
||
if (temp < RX_QLEN(dev)) {
|
||
if (rx_alloc_submit(dev, GFP_ATOMIC) == -ENOLINK)
|
||
return;
|
||
if (temp != dev->rxq.qlen)
|
||
netif_dbg(dev, link, dev->net,
|
||
"rxqlen %d --> %d\n",
|
||
temp, dev->rxq.qlen);
|
||
if (dev->rxq.qlen < RX_QLEN(dev))
|
||
tasklet_schedule (&dev->bh);
|
||
}
|
||
if (dev->txq.qlen < TX_QLEN (dev))
|
||
netif_wake_queue (dev->net);
|
||
}
|
||
}
|
||
|
||
static void usbnet_bh_tasklet(unsigned long data)
|
||
{
|
||
struct timer_list *t = (struct timer_list *)data;
|
||
|
||
usbnet_bh(t);
|
||
}
|
||
|
||
|
||
/*-------------------------------------------------------------------------
|
||
*
|
||
* USB Device Driver support
|
||
*
|
||
*-------------------------------------------------------------------------*/
|
||
|
||
// precondition: never called in_interrupt
|
||
|
||
void usbnet_disconnect (struct usb_interface *intf)
|
||
{
|
||
struct usbnet *dev;
|
||
struct usb_device *xdev;
|
||
struct net_device *net;
|
||
struct urb *urb;
|
||
|
||
dev = usb_get_intfdata(intf);
|
||
usb_set_intfdata(intf, NULL);
|
||
if (!dev)
|
||
return;
|
||
|
||
xdev = interface_to_usbdev (intf);
|
||
|
||
netif_info(dev, probe, dev->net, "unregister '%s' usb-%s-%s, %s\n",
|
||
intf->dev.driver->name,
|
||
xdev->bus->bus_name, xdev->devpath,
|
||
dev->driver_info->description);
|
||
|
||
net = dev->net;
|
||
unregister_netdev (net);
|
||
|
||
while ((urb = usb_get_from_anchor(&dev->deferred))) {
|
||
dev_kfree_skb(urb->context);
|
||
kfree(urb->sg);
|
||
usb_free_urb(urb);
|
||
}
|
||
|
||
if (dev->driver_info->unbind)
|
||
dev->driver_info->unbind (dev, intf);
|
||
|
||
usb_kill_urb(dev->interrupt);
|
||
usb_free_urb(dev->interrupt);
|
||
kfree(dev->padding_pkt);
|
||
|
||
free_percpu(dev->stats64);
|
||
free_netdev(net);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_disconnect);
|
||
|
||
static const struct net_device_ops usbnet_netdev_ops = {
|
||
.ndo_open = usbnet_open,
|
||
.ndo_stop = usbnet_stop,
|
||
.ndo_start_xmit = usbnet_start_xmit,
|
||
.ndo_tx_timeout = usbnet_tx_timeout,
|
||
.ndo_set_rx_mode = usbnet_set_rx_mode,
|
||
.ndo_change_mtu = usbnet_change_mtu,
|
||
.ndo_get_stats64 = usbnet_get_stats64,
|
||
.ndo_set_mac_address = eth_mac_addr,
|
||
.ndo_validate_addr = eth_validate_addr,
|
||
};
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
// precondition: never called in_interrupt
|
||
|
||
static struct device_type wlan_type = {
|
||
.name = "wlan",
|
||
};
|
||
|
||
static struct device_type wwan_type = {
|
||
.name = "wwan",
|
||
};
|
||
|
||
int
|
||
usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
|
||
{
|
||
struct usbnet *dev;
|
||
struct net_device *net;
|
||
struct usb_host_interface *interface;
|
||
const struct driver_info *info;
|
||
struct usb_device *xdev;
|
||
int status;
|
||
const char *name;
|
||
struct usb_driver *driver = to_usb_driver(udev->dev.driver);
|
||
|
||
/* usbnet already took usb runtime pm, so have to enable the feature
|
||
* for usb interface, otherwise usb_autopm_get_interface may return
|
||
* failure if RUNTIME_PM is enabled.
|
||
*/
|
||
if (!driver->supports_autosuspend) {
|
||
driver->supports_autosuspend = 1;
|
||
pm_runtime_enable(&udev->dev);
|
||
}
|
||
|
||
name = udev->dev.driver->name;
|
||
info = (const struct driver_info *) prod->driver_info;
|
||
if (!info) {
|
||
dev_dbg (&udev->dev, "blacklisted by %s\n", name);
|
||
return -ENODEV;
|
||
}
|
||
xdev = interface_to_usbdev (udev);
|
||
interface = udev->cur_altsetting;
|
||
|
||
status = -ENOMEM;
|
||
|
||
// set up our own records
|
||
net = alloc_etherdev(sizeof(*dev));
|
||
if (!net)
|
||
goto out;
|
||
|
||
/* netdev_printk() needs this so do it as early as possible */
|
||
SET_NETDEV_DEV(net, &udev->dev);
|
||
|
||
dev = netdev_priv(net);
|
||
dev->udev = xdev;
|
||
dev->intf = udev;
|
||
dev->driver_info = info;
|
||
dev->driver_name = name;
|
||
|
||
dev->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
|
||
if (!dev->stats64)
|
||
goto out0;
|
||
|
||
dev->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
|
||
| NETIF_MSG_PROBE | NETIF_MSG_LINK);
|
||
init_waitqueue_head(&dev->wait);
|
||
skb_queue_head_init (&dev->rxq);
|
||
skb_queue_head_init (&dev->txq);
|
||
skb_queue_head_init (&dev->done);
|
||
skb_queue_head_init(&dev->rxq_pause);
|
||
dev->bh.func = usbnet_bh_tasklet;
|
||
dev->bh.data = (unsigned long)&dev->delay;
|
||
INIT_WORK (&dev->kevent, usbnet_deferred_kevent);
|
||
init_usb_anchor(&dev->deferred);
|
||
timer_setup(&dev->delay, usbnet_bh, 0);
|
||
mutex_init (&dev->phy_mutex);
|
||
mutex_init(&dev->interrupt_mutex);
|
||
dev->interrupt_count = 0;
|
||
|
||
dev->net = net;
|
||
strcpy (net->name, "usb%d");
|
||
memcpy (net->dev_addr, node_id, sizeof node_id);
|
||
|
||
/* rx and tx sides can use different message sizes;
|
||
* bind() should set rx_urb_size in that case.
|
||
*/
|
||
dev->hard_mtu = net->mtu + net->hard_header_len;
|
||
net->min_mtu = 0;
|
||
net->max_mtu = ETH_MAX_MTU;
|
||
|
||
net->netdev_ops = &usbnet_netdev_ops;
|
||
net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
|
||
net->ethtool_ops = &usbnet_ethtool_ops;
|
||
|
||
// allow device-specific bind/init procedures
|
||
// NOTE net->name still not usable ...
|
||
if (info->bind) {
|
||
status = info->bind (dev, udev);
|
||
if (status < 0)
|
||
goto out1;
|
||
|
||
// heuristic: "usb%d" for links we know are two-host,
|
||
// else "eth%d" when there's reasonable doubt. userspace
|
||
// can rename the link if it knows better.
|
||
if ((dev->driver_info->flags & FLAG_ETHER) != 0 &&
|
||
((dev->driver_info->flags & FLAG_POINTTOPOINT) == 0 ||
|
||
(net->dev_addr [0] & 0x02) == 0))
|
||
strcpy (net->name, "eth%d");
|
||
/* WLAN devices should always be named "wlan%d" */
|
||
if ((dev->driver_info->flags & FLAG_WLAN) != 0)
|
||
strcpy(net->name, "wlan%d");
|
||
/* WWAN devices should always be named "wwan%d" */
|
||
if ((dev->driver_info->flags & FLAG_WWAN) != 0)
|
||
strcpy(net->name, "wwan%d");
|
||
|
||
/* devices that cannot do ARP */
|
||
if ((dev->driver_info->flags & FLAG_NOARP) != 0)
|
||
net->flags |= IFF_NOARP;
|
||
|
||
/* maybe the remote can't receive an Ethernet MTU */
|
||
if (net->mtu > (dev->hard_mtu - net->hard_header_len))
|
||
net->mtu = dev->hard_mtu - net->hard_header_len;
|
||
} else if (!info->in || !info->out)
|
||
status = usbnet_get_endpoints (dev, udev);
|
||
else {
|
||
u8 ep_addrs[3] = {
|
||
info->in + USB_DIR_IN, info->out + USB_DIR_OUT, 0
|
||
};
|
||
|
||
dev->in = usb_rcvbulkpipe (xdev, info->in);
|
||
dev->out = usb_sndbulkpipe (xdev, info->out);
|
||
if (!(info->flags & FLAG_NO_SETINT))
|
||
status = usb_set_interface (xdev,
|
||
interface->desc.bInterfaceNumber,
|
||
interface->desc.bAlternateSetting);
|
||
else
|
||
status = 0;
|
||
|
||
if (status == 0 && !usb_check_bulk_endpoints(udev, ep_addrs))
|
||
status = -EINVAL;
|
||
}
|
||
if (status >= 0 && dev->status)
|
||
status = init_status (dev, udev);
|
||
if (status < 0)
|
||
goto out3;
|
||
|
||
if (!dev->rx_urb_size)
|
||
dev->rx_urb_size = dev->hard_mtu;
|
||
dev->maxpacket = usb_maxpacket (dev->udev, dev->out, 1);
|
||
if (dev->maxpacket == 0) {
|
||
/* that is a broken device */
|
||
status = -ENODEV;
|
||
goto out4;
|
||
}
|
||
|
||
/* let userspace know we have a random address */
|
||
if (ether_addr_equal(net->dev_addr, node_id))
|
||
net->addr_assign_type = NET_ADDR_RANDOM;
|
||
|
||
if ((dev->driver_info->flags & FLAG_WLAN) != 0)
|
||
SET_NETDEV_DEVTYPE(net, &wlan_type);
|
||
if ((dev->driver_info->flags & FLAG_WWAN) != 0)
|
||
SET_NETDEV_DEVTYPE(net, &wwan_type);
|
||
|
||
/* initialize max rx_qlen and tx_qlen */
|
||
usbnet_update_max_qlen(dev);
|
||
|
||
if (dev->can_dma_sg && !(info->flags & FLAG_SEND_ZLP) &&
|
||
!(info->flags & FLAG_MULTI_PACKET)) {
|
||
dev->padding_pkt = kzalloc(1, GFP_KERNEL);
|
||
if (!dev->padding_pkt) {
|
||
status = -ENOMEM;
|
||
goto out4;
|
||
}
|
||
}
|
||
|
||
status = register_netdev (net);
|
||
if (status)
|
||
goto out5;
|
||
netif_info(dev, probe, dev->net,
|
||
"register '%s' at usb-%s-%s, %s, %pM\n",
|
||
udev->dev.driver->name,
|
||
xdev->bus->bus_name, xdev->devpath,
|
||
dev->driver_info->description,
|
||
net->dev_addr);
|
||
|
||
// ok, it's ready to go.
|
||
usb_set_intfdata (udev, dev);
|
||
|
||
netif_device_attach (net);
|
||
|
||
if (dev->driver_info->flags & FLAG_LINK_INTR)
|
||
usbnet_link_change(dev, 0, 0);
|
||
|
||
return 0;
|
||
|
||
out5:
|
||
kfree(dev->padding_pkt);
|
||
out4:
|
||
usb_free_urb(dev->interrupt);
|
||
out3:
|
||
if (info->unbind)
|
||
info->unbind (dev, udev);
|
||
out1:
|
||
/* subdrivers must undo all they did in bind() if they
|
||
* fail it, but we may fail later and a deferred kevent
|
||
* may trigger an error resubmitting itself and, worse,
|
||
* schedule a timer. So we kill it all just in case.
|
||
*/
|
||
cancel_work_sync(&dev->kevent);
|
||
del_timer_sync(&dev->delay);
|
||
free_percpu(dev->stats64);
|
||
out0:
|
||
free_netdev(net);
|
||
out:
|
||
return status;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_probe);
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
/*
|
||
* suspend the whole driver as soon as the first interface is suspended
|
||
* resume only when the last interface is resumed
|
||
*/
|
||
|
||
int usbnet_suspend (struct usb_interface *intf, pm_message_t message)
|
||
{
|
||
struct usbnet *dev = usb_get_intfdata(intf);
|
||
|
||
if (!dev->suspend_count++) {
|
||
spin_lock_irq(&dev->txq.lock);
|
||
/* don't autosuspend while transmitting */
|
||
if (dev->txq.qlen && PMSG_IS_AUTO(message)) {
|
||
dev->suspend_count--;
|
||
spin_unlock_irq(&dev->txq.lock);
|
||
return -EBUSY;
|
||
} else {
|
||
set_bit(EVENT_DEV_ASLEEP, &dev->flags);
|
||
spin_unlock_irq(&dev->txq.lock);
|
||
}
|
||
/*
|
||
* accelerate emptying of the rx and queues, to avoid
|
||
* having everything error out.
|
||
*/
|
||
netif_device_detach (dev->net);
|
||
usbnet_terminate_urbs(dev);
|
||
__usbnet_status_stop_force(dev);
|
||
|
||
/*
|
||
* reattach so runtime management can use and
|
||
* wake the device
|
||
*/
|
||
netif_device_attach (dev->net);
|
||
}
|
||
return 0;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_suspend);
|
||
|
||
int usbnet_resume (struct usb_interface *intf)
|
||
{
|
||
struct usbnet *dev = usb_get_intfdata(intf);
|
||
struct sk_buff *skb;
|
||
struct urb *res;
|
||
int retval;
|
||
|
||
if (!--dev->suspend_count) {
|
||
/* resume interrupt URB if it was previously submitted */
|
||
__usbnet_status_start_force(dev, GFP_NOIO);
|
||
|
||
spin_lock_irq(&dev->txq.lock);
|
||
while ((res = usb_get_from_anchor(&dev->deferred))) {
|
||
|
||
skb = (struct sk_buff *)res->context;
|
||
retval = usb_submit_urb(res, GFP_ATOMIC);
|
||
if (retval < 0) {
|
||
dev_kfree_skb_any(skb);
|
||
kfree(res->sg);
|
||
usb_free_urb(res);
|
||
usb_autopm_put_interface_async(dev->intf);
|
||
} else {
|
||
netif_trans_update(dev->net);
|
||
__skb_queue_tail(&dev->txq, skb);
|
||
}
|
||
}
|
||
|
||
smp_mb();
|
||
clear_bit(EVENT_DEV_ASLEEP, &dev->flags);
|
||
spin_unlock_irq(&dev->txq.lock);
|
||
|
||
if (test_bit(EVENT_DEV_OPEN, &dev->flags)) {
|
||
/* handle remote wakeup ASAP
|
||
* we cannot race against stop
|
||
*/
|
||
if (netif_device_present(dev->net) &&
|
||
!timer_pending(&dev->delay) &&
|
||
!test_bit(EVENT_RX_HALT, &dev->flags))
|
||
rx_alloc_submit(dev, GFP_NOIO);
|
||
|
||
if (!(dev->txq.qlen >= TX_QLEN(dev)))
|
||
netif_tx_wake_all_queues(dev->net);
|
||
tasklet_schedule (&dev->bh);
|
||
}
|
||
}
|
||
|
||
if (test_and_clear_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags))
|
||
usb_autopm_get_interface_no_resume(intf);
|
||
|
||
return 0;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_resume);
|
||
|
||
/*
|
||
* Either a subdriver implements manage_power, then it is assumed to always
|
||
* be ready to be suspended or it reports the readiness to be suspended
|
||
* explicitly
|
||
*/
|
||
void usbnet_device_suggests_idle(struct usbnet *dev)
|
||
{
|
||
if (!test_and_set_bit(EVENT_DEVICE_REPORT_IDLE, &dev->flags)) {
|
||
dev->intf->needs_remote_wakeup = 1;
|
||
usb_autopm_put_interface_async(dev->intf);
|
||
}
|
||
}
|
||
EXPORT_SYMBOL(usbnet_device_suggests_idle);
|
||
|
||
/*
|
||
* For devices that can do without special commands
|
||
*/
|
||
int usbnet_manage_power(struct usbnet *dev, int on)
|
||
{
|
||
dev->intf->needs_remote_wakeup = on;
|
||
return 0;
|
||
}
|
||
EXPORT_SYMBOL(usbnet_manage_power);
|
||
|
||
void usbnet_link_change(struct usbnet *dev, bool link, bool need_reset)
|
||
{
|
||
/* update link after link is reseted */
|
||
if (link && !need_reset)
|
||
netif_carrier_on(dev->net);
|
||
else
|
||
netif_carrier_off(dev->net);
|
||
|
||
if (need_reset && link)
|
||
usbnet_defer_kevent(dev, EVENT_LINK_RESET);
|
||
else
|
||
usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
|
||
}
|
||
EXPORT_SYMBOL(usbnet_link_change);
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
|
||
u16 value, u16 index, void *data, u16 size)
|
||
{
|
||
void *buf = NULL;
|
||
int err = -ENOMEM;
|
||
|
||
netdev_dbg(dev->net, "usbnet_read_cmd cmd=0x%02x reqtype=%02x"
|
||
" value=0x%04x index=0x%04x size=%d\n",
|
||
cmd, reqtype, value, index, size);
|
||
|
||
if (size) {
|
||
buf = kmalloc(size, GFP_NOIO);
|
||
if (!buf)
|
||
goto out;
|
||
}
|
||
|
||
err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
|
||
cmd, reqtype, value, index, buf, size,
|
||
USB_CTRL_GET_TIMEOUT);
|
||
if (err > 0 && err <= size) {
|
||
if (data)
|
||
memcpy(data, buf, err);
|
||
else
|
||
netdev_dbg(dev->net,
|
||
"Huh? Data requested but thrown away.\n");
|
||
}
|
||
kfree(buf);
|
||
out:
|
||
return err;
|
||
}
|
||
|
||
static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
|
||
u16 value, u16 index, const void *data,
|
||
u16 size)
|
||
{
|
||
void *buf = NULL;
|
||
int err = -ENOMEM;
|
||
|
||
netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x"
|
||
" value=0x%04x index=0x%04x size=%d\n",
|
||
cmd, reqtype, value, index, size);
|
||
|
||
if (data) {
|
||
buf = kmemdup(data, size, GFP_NOIO);
|
||
if (!buf)
|
||
goto out;
|
||
} else {
|
||
if (size) {
|
||
WARN_ON_ONCE(1);
|
||
err = -EINVAL;
|
||
goto out;
|
||
}
|
||
}
|
||
|
||
err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
|
||
cmd, reqtype, value, index, buf, size,
|
||
USB_CTRL_SET_TIMEOUT);
|
||
kfree(buf);
|
||
|
||
out:
|
||
return err;
|
||
}
|
||
|
||
/*
|
||
* The function can't be called inside suspend/resume callback,
|
||
* otherwise deadlock will be caused.
|
||
*/
|
||
int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
|
||
u16 value, u16 index, void *data, u16 size)
|
||
{
|
||
int ret;
|
||
|
||
if (usb_autopm_get_interface(dev->intf) < 0)
|
||
return -ENODEV;
|
||
ret = __usbnet_read_cmd(dev, cmd, reqtype, value, index,
|
||
data, size);
|
||
usb_autopm_put_interface(dev->intf);
|
||
return ret;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_read_cmd);
|
||
|
||
/*
|
||
* The function can't be called inside suspend/resume callback,
|
||
* otherwise deadlock will be caused.
|
||
*/
|
||
int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype,
|
||
u16 value, u16 index, const void *data, u16 size)
|
||
{
|
||
int ret;
|
||
|
||
if (usb_autopm_get_interface(dev->intf) < 0)
|
||
return -ENODEV;
|
||
ret = __usbnet_write_cmd(dev, cmd, reqtype, value, index,
|
||
data, size);
|
||
usb_autopm_put_interface(dev->intf);
|
||
return ret;
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_write_cmd);
|
||
|
||
/*
|
||
* The function can be called inside suspend/resume callback safely
|
||
* and should only be called by suspend/resume callback generally.
|
||
*/
|
||
int usbnet_read_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype,
|
||
u16 value, u16 index, void *data, u16 size)
|
||
{
|
||
return __usbnet_read_cmd(dev, cmd, reqtype, value, index,
|
||
data, size);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_read_cmd_nopm);
|
||
|
||
/*
|
||
* The function can be called inside suspend/resume callback safely
|
||
* and should only be called by suspend/resume callback generally.
|
||
*/
|
||
int usbnet_write_cmd_nopm(struct usbnet *dev, u8 cmd, u8 reqtype,
|
||
u16 value, u16 index, const void *data,
|
||
u16 size)
|
||
{
|
||
return __usbnet_write_cmd(dev, cmd, reqtype, value, index,
|
||
data, size);
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_write_cmd_nopm);
|
||
|
||
static void usbnet_async_cmd_cb(struct urb *urb)
|
||
{
|
||
struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
|
||
int status = urb->status;
|
||
|
||
if (status < 0)
|
||
dev_dbg(&urb->dev->dev, "%s failed with %d",
|
||
__func__, status);
|
||
|
||
kfree(req);
|
||
usb_free_urb(urb);
|
||
}
|
||
|
||
/*
|
||
* The caller must make sure that device can't be put into suspend
|
||
* state until the control URB completes.
|
||
*/
|
||
int usbnet_write_cmd_async(struct usbnet *dev, u8 cmd, u8 reqtype,
|
||
u16 value, u16 index, const void *data, u16 size)
|
||
{
|
||
struct usb_ctrlrequest *req;
|
||
struct urb *urb;
|
||
int err = -ENOMEM;
|
||
void *buf = NULL;
|
||
|
||
netdev_dbg(dev->net, "usbnet_write_cmd cmd=0x%02x reqtype=%02x"
|
||
" value=0x%04x index=0x%04x size=%d\n",
|
||
cmd, reqtype, value, index, size);
|
||
|
||
urb = usb_alloc_urb(0, GFP_ATOMIC);
|
||
if (!urb)
|
||
goto fail;
|
||
|
||
if (data) {
|
||
buf = kmemdup(data, size, GFP_ATOMIC);
|
||
if (!buf) {
|
||
netdev_err(dev->net, "Error allocating buffer"
|
||
" in %s!\n", __func__);
|
||
goto fail_free_urb;
|
||
}
|
||
}
|
||
|
||
req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
|
||
if (!req)
|
||
goto fail_free_buf;
|
||
|
||
req->bRequestType = reqtype;
|
||
req->bRequest = cmd;
|
||
req->wValue = cpu_to_le16(value);
|
||
req->wIndex = cpu_to_le16(index);
|
||
req->wLength = cpu_to_le16(size);
|
||
|
||
usb_fill_control_urb(urb, dev->udev,
|
||
usb_sndctrlpipe(dev->udev, 0),
|
||
(void *)req, buf, size,
|
||
usbnet_async_cmd_cb, req);
|
||
urb->transfer_flags |= URB_FREE_BUFFER;
|
||
|
||
err = usb_submit_urb(urb, GFP_ATOMIC);
|
||
if (err < 0) {
|
||
netdev_err(dev->net, "Error submitting the control"
|
||
" message: status=%d\n", err);
|
||
goto fail_free_all;
|
||
}
|
||
return 0;
|
||
|
||
fail_free_all:
|
||
kfree(req);
|
||
fail_free_buf:
|
||
kfree(buf);
|
||
/*
|
||
* avoid a double free
|
||
* needed because the flag can be set only
|
||
* after filling the URB
|
||
*/
|
||
urb->transfer_flags = 0;
|
||
fail_free_urb:
|
||
usb_free_urb(urb);
|
||
fail:
|
||
return err;
|
||
|
||
}
|
||
EXPORT_SYMBOL_GPL(usbnet_write_cmd_async);
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static int __init usbnet_init(void)
|
||
{
|
||
/* Compiler should optimize this out. */
|
||
BUILD_BUG_ON(
|
||
FIELD_SIZEOF(struct sk_buff, cb) < sizeof(struct skb_data));
|
||
|
||
eth_random_addr(node_id);
|
||
return 0;
|
||
}
|
||
module_init(usbnet_init);
|
||
|
||
static void __exit usbnet_exit(void)
|
||
{
|
||
}
|
||
module_exit(usbnet_exit);
|
||
|
||
MODULE_AUTHOR("David Brownell");
|
||
MODULE_DESCRIPTION("USB network driver framework");
|
||
MODULE_LICENSE("GPL");
|