linux-kernel - [34-longterm 170/209] PM / Hibernate: Fix PM_POST

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Date:	Thu, 14 Apr 2011 13:55:28 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	stable@...nel.org, linux-kernel@...r.kernel.org
Cc:	stable-review@...nel.org, Takashi Iwai <tiwai@...e.de>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [34-longterm 170/209] PM / Hibernate: Fix PM_POST_* notification with user-space suspend

From: Takashi Iwai <tiwai@...e.de>

  =====================================================================
  | This is a commit scheduled for the next v2.6.34 longterm release. |
  | If you see a problem with using this for longterm, please comment.|
  =====================================================================

commit 1497dd1d29c6a53fcd3c80f7ac8d0e0239e7389e upstream.

The user-space hibernation sends a wrong notification after the image
restoration because of thinko for the file flag check.  RDONLY
corresponds to hibernation and WRONLY to restoration, confusingly.

Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 kernel/power/user.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/power/user.c b/kernel/power/user.c
index a8c9621..16a7d95 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -137,7 +137,7 @@ static int snapshot_release(struct inode *inode, struct file *filp)
 	free_all_swap_pages(data->swap);
 	if (data->frozen)
 		thaw_processes();
-	pm_notifier_call_chain(data->mode == O_WRONLY ?
+	pm_notifier_call_chain(data->mode == O_RDONLY ?
 			PM_POST_HIBERNATION : PM_POST_RESTORE);
 	atomic_inc(&snapshot_device_available);
 
-- 
1.7.4.4

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