From: Donald Douwsma <donaldd@sgi.com>
Date: Fri, 23 Nov 2007 05:27:42 +0000 (+1100)
Subject: [XFS] Fix dbflush panic in xfs_qm_sync.
X-Git-Tag: v2.6.24-rc5~19^2~7
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=d757762bf2f6aea954745c76b4d767067b85be9d;p=linux-2.6-omap-h63xx.git

[XFS] Fix dbflush panic in xfs_qm_sync.

The recent behaviour layer removal dropped the check for quotas that have
been requested at mount time but have subsequently been turned off. This
results in a panic when accessing m_quotainfo which has been freed.

This patch adds the check originally made by xfs_qm_syncall() to
xfs_qm_sync().

SGI-PV: 969769
SGI-Modid: xfs-linux-melb:xfs-kern:29908a

Signed-off-by: Donald Douwsma <donaldd@sgi.com>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
---

diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c
index b5f91281b70..d488645f833 100644
--- a/fs/xfs/quota/xfs_qm.c
+++ b/fs/xfs/quota/xfs_qm.c
@@ -1008,6 +1008,9 @@ xfs_qm_sync(
 	boolean_t	nowait;
 	int		error;
 
+	if (! XFS_IS_QUOTA_ON(mp))
+		return 0;
+
 	restarts = 0;
 	/*
 	 * We won't block unless we are asked to.