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Commit 36cb7035 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
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PM / Hibernate: Fix ioctl SNAPSHOT_S2RAM 



The SNAPSHOT_S2RAM ioctl used for implementing the feature allowing
one to suspend to RAM after creating a hibernation image is currently
broken, because it doesn't clear the "ready" flag in the struct
snapshot_data object handled by it.  As a result, the
SNAPSHOT_UNFREEZE doesn't work correctly after SNAPSHOT_S2RAM has
returned and the user space hibernate task cannot thaw the other
processes as appropriate.  Make SNAPSHOT_S2RAM clear data->ready
to fix this problem.

Tested-by: default avatarAlexandre Felipe Muller de Souza <alexandrefm@mandriva.com.br>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Cc: stable@kernel.org
parent 9744997a

kernel/power/user.c

+1 −0
Original line number Diff line number Diff line
@@ -381,6 +381,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, 
		 * PM_HIBERNATION_PREPARE

		 */

		error = suspend_devices_and_enter(PM_SUSPEND_MEM);

		data->ready = 0;

		break;



	case SNAPSHOT_PLATFORM_SUPPORT: