linux-kernel - [PATCH 7/9] PM: Fix pm_notifiers during user mode hibernation

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Message-Id: <200902140205.16278.rjw@sisk.pl>
Date:	Sat, 14 Feb 2009 02:05:14 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Len Brown <lenb@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Arve Hjønnevåg <arve@...roid.com>,
	Greg KH <gregkh@...e.de>, Ingo Molnar <mingo@...e.hu>,
	Johannes Weiner <hannes@...xchg.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Pavel Machek <pavel@....cz>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Alan Jenkins <alan-jenkins@...fmail.co.uk>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Andrey Borzenkov <arvidjaar@...l.ru>
Subject: [PATCH 7/9] PM: Fix pm_notifiers during user mode hibernation

From: Andrey Borzenkov <arvidjaar@...l.ru>

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: Andrey Borzenkov <arvidjaar@...l.ru>
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
Acked-by: Pavel Machek <pavel@....cz>
---

 kernel/power/user.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Index: linux-2.6/kernel/power/user.c
===================================================================
--- linux-2.6.orig/kernel/power/user.c
+++ linux-2.6/kernel/power/user.c
@@ -95,15 +95,15 @@ static int snapshot_open(struct inode *i
 		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);
--
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