linux

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Liu ShuoX e5248a111b PM / Sleep: avoid 'autosleep' in shutdown progress

Prevent automatic system suspend from happening during system
shutdown by making try_to_suspend() check system_state and return
immediately if it is not SYSTEM_RUNNING.

This prevents the following breakage from happening (scenario from
Zhang Yanmin):

 Kernel starts shutdown and calls all device driver's shutdown
 callback.  When a driver's shutdown is called, the last wakelock is
 released and suspend-to-ram starts.  However, as some driver's shut
 down callbacks already shut down devices and disabled runtime pm,
 the suspend-to-ram calls driver's suspend callback without noticing
 that device is already off and causes crash.

[rjw: Changelog]
Signed-off-by: Liu ShuoX <shuox.liu@intel.com>
Cc: 3.5+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

2013-07-15 01:31:37 +02:00

autosleep.c

PM / Sleep: avoid 'autosleep' in shutdown progress

2013-07-15 01:31:37 +02:00

block_io.c

block: kill off REQ_UNPLUG

2011-03-10 08:52:27 +01:00

console.c

PM: make VT switching to the suspend console optional v3

2013-02-20 01:33:41 +01:00

hibernate.c

Power management updates for 3.6