android_kernel_xiaomi_sm8350/drivers/usb
Benjamin Herrenschmidt 8de9840265 [PATCH] USB: Fix USB suspend/resume crasher (#2)
This patch closes the IRQ race and makes various other OHCI & EHCI code
path safer vs. suspend/resume.
I've been able to (finally !) successfully suspend and resume various
Mac models, with or without USB mouse plugged, or plugging while asleep,
or unplugging while asleep etc... all without a crash.

Alan, please verify the UHCI bit I did, I only verified that it builds.
It's very simple so I wouldn't expect any issue there. If you aren't
confident, then just drop the hunks that change uhci-hcd.c

I also made the patch a little bit more "safer" by making sure the store
to the interrupt register that disables interrupts is not posted before
I set the flag and drop the spinlock.

Without this patch, you cannot reliably sleep/wakeup any recent Mac, and
I suspect PCs have some more sneaky issues too (they don't frankly crash
with machine checks because x86 tend to silently swallow PCI errors but
that won't last afaik, at least PCI Express will blow up in those
situations, but the USB code may still misbehave).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-11-29 21:39:23 -08:00
..
atm [PATCH] Additional device ID for Conexant AccessRunner USB driver 2005-11-29 21:39:22 -08:00
class [PATCH] USB: cdc-acm patch to use kzalloc 2005-10-28 16:47:49 -07:00
core [PATCH] USB: Fix USB suspend/resume crasher (#2) 2005-11-29 21:39:23 -08:00
gadget [PATCH] USB: fix build breakage in dummy_hcd.c 2005-11-17 11:29:52 -08:00
host [PATCH] USB: Fix USB suspend/resume crasher (#2) 2005-11-29 21:39:23 -08:00
image [PATCH] USB: Adapt microtek driver to new scsi features 2005-11-17 11:29:54 -08:00
input [PATCH] USB: move CONFIG_USB_DEBUG checks into the Makefile 2005-11-17 11:29:55 -08:00
media [PATCH] USB: SN9C10x driver - bad page state fix 2005-11-23 23:04:27 -08:00
misc [PATCH] USB: move CONFIG_USB_DEBUG checks into the Makefile 2005-11-17 11:29:55 -08:00
mon [PATCH] USB: convert usbmon to use usb notifiers 2005-10-28 16:47:46 -07:00
net [PATCH] USB: move CONFIG_USB_DEBUG checks into the Makefile 2005-11-17 11:29:55 -08:00
serial [PATCH] usb serial: remove redundant include 2005-11-23 23:04:28 -08:00
storage [PATCH] USB: fix USB key generates ioctl_internal_command errors issue 2005-11-23 23:04:28 -08:00
Kconfig [PATCH] USB: add S3C24XX USB Host driver support 2005-07-29 13:12:53 -07:00
Makefile [PATCH] USB: delete the bluetty driver 2005-10-28 16:47:47 -07:00
README Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
usb-skeleton.c [PATCH] devfs: Remove the mode field from usb_class_driver as it's no longer needed 2005-10-28 16:47:37 -07:00

To understand all the Linux-USB framework, you'll use these resources:

    * This source code.  This is necessarily an evolving work, and
      includes kerneldoc that should help you get a current overview.
      ("make pdfdocs", and then look at "usb.pdf" for host side and
      "gadget.pdf" for peripheral side.)  Also, Documentation/usb has
      more information.

    * The USB 2.0 specification (from www.usb.org), with supplements
      such as those for USB OTG and the various device classes.
      The USB specification has a good overview chapter, and USB
      peripherals conform to the widely known "Chapter 9".

    * Chip specifications for USB controllers.  Examples include
      host controllers (on PCs, servers, and more); peripheral
      controllers (in devices with Linux firmware, like printers or
      cell phones); and hard-wired peripherals like Ethernet adapters.

    * Specifications for other protocols implemented by USB peripheral
      functions.  Some are vendor-specific; others are vendor-neutral
      but just standardized outside of the www.usb.org team.

Here is a list of what each subdirectory here is, and what is contained in
them.

core/		- This is for the core USB host code, including the
		  usbfs files and the hub class driver ("khubd").

host/		- This is for USB host controller drivers.  This
		  includes UHCI, OHCI, EHCI, and others that might
		  be used with more specialized "embedded" systems.

gadget/		- This is for USB peripheral controller drivers and
		  the various gadget drivers which talk to them.


Individual USB driver directories.  A new driver should be added to the
first subdirectory in the list below that it fits into.

image/		- This is for still image drivers, like scanners or
		  digital cameras.
input/		- This is for any driver that uses the input subsystem,
		  like keyboard, mice, touchscreens, tablets, etc.
media/		- This is for multimedia drivers, like video cameras,
		  radios, and any other drivers that talk to the v4l
		  subsystem.
net/		- This is for network drivers.
serial/		- This is for USB to serial drivers.
storage/	- This is for USB mass-storage drivers.
class/		- This is for all USB device drivers that do not fit
		  into any of the above categories, and work for a range
		  of USB Class specified devices. 
misc/		- This is for all USB device drivers that do not fit
		  into any of the above categories.