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Commit ebae2604 authored by Andrey Borzenkov's avatar Andrey Borzenkov Committed by Linus Torvalds
Browse files

PM: Fix pm_notifiers during user mode hibernation 



Snapshot device is opened with O_RDONLY during suspend and O_WRONLY durig
resume.  Make sure we also call notifiers with correct parameter telling
them what we are really doing.

Signed-off-by: default avatarAndrey Borzenkov <arvidjaar@mail.ru>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <gregkh@suse.de>
Acked-by: default avatarPavel Machek <pavel@ucw.cz>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0cb57258

kernel/power/user.c

+4 −4
Original line number Diff line number Diff line
@@ -95,15 +95,15 @@ static int snapshot_open(struct inode *inode, struct file *filp) 
		data->swap = swsusp_resume_device ?

			swap_type_of(swsusp_resume_device, 0, NULL) : -1;

		data->mode = O_RDONLY;

		error = pm_notifier_call_chain(PM_RESTORE_PREPARE);

		error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);

		if (error)

			pm_notifier_call_chain(PM_POST_RESTORE);

			pm_notifier_call_chain(PM_POST_HIBERNATION);

	} else {

		data->swap = -1;

		data->mode = O_WRONLY;

		error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);

		error = pm_notifier_call_chain(PM_RESTORE_PREPARE);

		if (error)

			pm_notifier_call_chain(PM_POST_HIBERNATION);

			pm_notifier_call_chain(PM_POST_RESTORE);

	}

	if (error)

		atomic_inc(&snapshot_device_available);