| commit | e8665002477f0278f84f898145b1f141ba26ee26 | |
| author | Rafael J. Wysocki <rjw@sisk.pl> | |
| Sat, 12 Feb 2011 00:42:41 +0000 (12 01:42 +0100) | ||
| committer | Rafael J. Wysocki <rjw@sisk.pl> | |
| Mon, 14 Mar 2011 23:43:16 +0000 (15 00:43 +0100) | ||
| tree | f22348cc3c0cf341216d422e01d2ac033973a0a5 | treesnapshot (tar.gz zip) |
| parent | 88a6f33e4d7143f94f8e787fa4065ac873507984 | commitdiff |
PM: Allow pm_runtime_suspend() to succeed during system suspend
The dpm_prepare() function increments the runtime PM reference
counters of all devices to prevent pm_runtime_suspend() from
executing subsystem-level callbacks. However, this was supposed to
guard against a specific race condition that cannot happen, because
the power management workqueue is freezable, so pm_runtime_suspend()
can only be called synchronously during system suspend and we can
rely on subsystems and device drivers to avoid doing that
unnecessarily.
Make dpm_prepare() drop the runtime PM reference to each device
after making sure that runtime resume is not pending for it.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Kevin Hilman <khilman@ti.com>
The dpm_prepare() function increments the runtime PM reference
counters of all devices to prevent pm_runtime_suspend() from
executing subsystem-level callbacks. However, this was supposed to
guard against a specific race condition that cannot happen, because
the power management workqueue is freezable, so pm_runtime_suspend()
can only be called synchronously during system suspend and we can
rely on subsystems and device drivers to avoid doing that
unnecessarily.
Make dpm_prepare() drop the runtime PM reference to each device
after making sure that runtime resume is not pending for it.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Kevin Hilman <khilman@ti.com>
| drivers/base/power/main.c | diffblobblamehistory |