From 1525a2ad76f991eba9755f75c9b6d4d97abad25e Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Date: Sun, 6 May 2007 14:50:44 -0700
Subject: [PATCH] swsusp: fix error paths in snapshot_open
We forget to increase device_available if there's an error in snapshot_open(),
so the snapshot device cannot be open at all after snapshot_open() has
returned an error.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
kernel/power/user.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 845acd84cb23..bd1771f7a64e 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -49,12 +49,14 @@ static int snapshot_open(struct inode *inode, struct file *filp)
if (!atomic_add_unless(&device_available, -1, 0))
return -EBUSY;
- if ((filp->f_flags & O_ACCMODE) == O_RDWR)
+ if ((filp->f_flags & O_ACCMODE) == O_RDWR) {
+ atomic_inc(&device_available);
return -ENOSYS;
-
- if(create_basic_memory_bitmaps())
+ }
+ if(create_basic_memory_bitmaps()) {
+ atomic_inc(&device_available);
return -ENOMEM;
-
+ }
nonseekable_open(inode, filp);
data = &snapshot_state;
filp->private_data = data;
--
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