android_kernel_xiaomi_sm8350/drivers/pcmcia
David Brownell 49a4ec188f fix hotplug for legacy platform drivers
We've had various reports of some legacy "probe the hardware" style
platform drivers having nasty problems with hotplug support.

The core issue is that those legacy drivers don't fully conform to the
driver model.  They assume a role that should be the responsibility of
infrastructure code: creating device nodes.

The "modprobe" step in hotplugging relies on drivers to have split those
roles into different modules.  The lack of this split causes the problems.
When a driver creates nodes for devices that don't exist (sending a hotplug
event), then exits (aborting one modprobe) before the "modprobe $MODALIAS"
step completes (by failing, since it's in the middle of a modprobe), the
result can be an endless loop of modprobe invocations ...  badness.

This fix uses the newish per-device flag controlling issuance of "add"
events.  (A previous version of this patch used a per-device "driver can
hotplug" flag, which only scrubbed $MODALIAS from the environment rather
than suppressing the entire hotplug event.) It also shrinks that flag to
one bit, saving a word in "struct device".

So the net of this patch is removing some nasty failures with legacy
drivers, while retaining hotplug capability for the majority of platform
drivers.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Greg KH <gregkh@suse.de>
Cc: Andres Salomon <dilinger@debian.org>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:10 -07:00
..
at91_cf.c at91_cf, minor fix 2007-05-07 12:12:50 -07:00
au1000_db1x00.c
au1000_generic.c [PATCH] Fix struct device member name in PCMCIA au1000_generic 2007-03-27 09:05:16 -07:00
au1000_generic.h
au1000_pb1x00.c
au1000_xxs1500.c
cardbus.c Remove useless FIND_FIRST_BIT() macro from cardbus.c. 2007-02-17 19:16:31 +01:00
cirrus.h
cistpl.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
cs_internal.h
cs.c PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
ds_internal.h
ds.c add new_id to PCMCIA drivers 2007-05-07 12:12:50 -07:00
hd64465_ss.c Driver core: more fallout from class_device changes for pcmcia 2007-02-23 14:52:09 -08:00
i82092.c
i82092aa.h
i82365.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
i82365.h
Kconfig
m8xx_pcmcia.c Driver core: more fallout from class_device changes for pcmcia 2007-02-23 14:52:09 -08:00
m32r_cfc.c Driver core: more fallout from class_device changes for pcmcia 2007-02-23 14:52:09 -08:00
m32r_cfc.h
m32r_pcc.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
m32r_pcc.h
Makefile
o2micro.h
omap_cf.c [PATCH] omap_cf: oops-on-suspend fix 2007-04-08 19:47:55 -07:00
pcmcia_ioctl.c
pcmcia_resource.c
pd6729.c
pd6729.h
pxa2xx_base.c
pxa2xx_base.h
pxa2xx_lubbock.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
pxa2xx_mainstone.c fix hotplug for legacy platform drivers 2007-05-08 11:15:10 -07:00
pxa2xx_sharpsl.c fix hotplug for legacy platform drivers 2007-05-08 11:15:10 -07:00
ricoh.h
rsrc_mgr.c Driver core: more fallout from class_device changes for pcmcia 2007-02-23 14:52:09 -08:00
rsrc_nonstatic.c
sa11xx_base.c
sa11xx_base.h
sa1100_assabet.c
sa1100_badge4.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sa1100_cerf.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sa1100_generic.c
sa1100_generic.h
sa1100_h3600.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sa1100_jornada720.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sa1100_neponset.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sa1100_shannon.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sa1100_simpad.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
sa1111_generic.c
sa1111_generic.h
soc_common.c pcmcia: some class_device fallout 2007-02-16 15:19:18 -08:00
soc_common.h
socket_sysfs.c PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
tcic.c
tcic.h
ti113x.h
topic.h
vg468.h
vrc4171_card.c Driver core: more fallout from class_device changes for pcmcia 2007-02-23 14:52:09 -08:00
vrc4173_cardu.c
vrc4173_cardu.h
yenta_socket.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
yenta_socket.h