kernel-fxtec-pro1x/drivers/base/power
Rafael J. Wysocki da863cddd8 PM / Sleep: Fix race conditions related to wakeup source timer function
If __pm_wakeup_event() has been used (with a nonzero timeout) to
report a wakeup event and then __pm_relax() immediately followed by
__pm_stay_awake() is called or __pm_wakeup_event() is called once
again for the same wakeup source object before its timer expires, the
timer function pm_wakeup_timer_fn() may still be run as a result of
the previous __pm_wakeup_event() call.  In either of those cases it
may mistakenly deactivate the wakeup source that has just been
activated.

To prevent that from happening, make wakeup_source_deactivate()
clear the wakeup source's timer_expires field and make
pm_wakeup_timer_fn() check if timer_expires is different from zero
and if it's not in future before calling wakeup_source_deactivate()
(if timer_expires is 0, it means that the timer has just been
deleted and if timer_expires is in future, it means that the timer
has just been rescheduled to a different time).

Reported-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2012-03-04 23:08:14 +01:00
..
clock_ops.c PM / Clocks: Only disable enabled clocks in pm_clk_suspend() 2011-11-10 00:44:10 +01:00
common.c drivers/base: change module.h -> export.h in power/common.c 2011-10-31 19:31:39 -04:00
domain.c PM / Domains: Fix build for CONFIG_PM_SLEEP unset 2012-01-14 00:39:25 +01:00
domain_governor.c PM / Domains: Skip governor functions for CONFIG_PM_RUNTIME unset 2012-01-14 00:39:36 +01:00
generic_ops.c PM / Sleep: Introduce generic callbacks for new device PM phases 2012-01-29 20:38:41 +01:00
main.c PM / Sleep: Introduce "late suspend" and "early resume" of devices 2012-01-29 20:38:29 +01:00
Makefile PM / Domains: Add device stop governor function (v4) 2011-12-01 21:47:40 +01:00
opp.c PM / OPP: Use ERR_CAST instead of ERR_PTR(PTR_ERR()) 2011-11-08 22:34:00 +01:00
power.h PM / QoS: Add function dev_pm_qos_read_value() (v3) 2011-10-04 21:54:26 +02:00
qos.c Merge branch 'pm-domains' into pm-for-linus 2011-12-25 23:43:11 +01:00
runtime.c Merge branch 'pm-runtime' into pm-for-linus 2011-12-25 23:43:05 +01:00
sysfs.c drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required. 2011-10-31 19:31:38 -04:00
trace.c drivers/base: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required. 2011-10-31 19:31:38 -04:00
wakeup.c PM / Sleep: Fix race conditions related to wakeup source timer function 2012-03-04 23:08:14 +01:00