[XFS] actually check error returned by xfs_flush_pages, clean up and
bailout if fails.

SGI-PV: 973041
SGI-Modid: xfs-linux-melb:xfs-kern:30462a

Signed-off-by: Niv Sardi <xaiki@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 2def273..87f6467 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -5869,6 +5869,10 @@
 		/* xfs_fsize_t last_byte = xfs_file_last_byte(ip); */
 		error = xfs_flush_pages(ip, (xfs_off_t)0,
 					       -1, 0, FI_REMAPF);
+		if (error) {
+			xfs_iunlock(ip, XFS_IOLOCK_SHARED);
+		return error;
+		}
 	}
 
 	ASSERT(whichfork == XFS_ATTR_FORK || ip->i_delayed_blks == 0);