From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752000AbXCQW0M (ORCPT ); Sat, 17 Mar 2007 18:26:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752072AbXCQW0M (ORCPT ); Sat, 17 Mar 2007 18:26:12 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:41616 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752000AbXCQW0K (ORCPT ); Sat, 17 Mar 2007 18:26:10 -0400 From: "Rafael J. Wysocki" To: Andrew Morton Subject: [PATCH -mm 1/2] swsusp: Fix error paths in snapshot_open Date: Sat, 17 Mar 2007 23:24:35 +0100 User-Agent: KMail/1.9.5 Cc: Pavel Machek , LKML References: <200703172322.33079.rjw@sisk.pl> In-Reply-To: <200703172322.33079.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200703172324.35833.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Rafael J. Wysocki 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 --- kernel/power/user.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) Index: linux-2.6.21-rc4/kernel/power/user.c =================================================================== --- linux-2.6.21-rc4.orig/kernel/power/user.c +++ linux-2.6.21-rc4/kernel/power/user.c @@ -49,12 +49,14 @@ static int snapshot_open(struct inode *i 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;