[XFS] fix PBF_NONE handling

SGI-PV: 908809
SGI-Modid: xfs-linux:xfs-kern:198669a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 489b7f63fd1f..188cbbd5b74a 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -458,7 +458,8 @@ _pagebuf_lookup_pages(
                         unlock_page(bp->pb_pages[i]);
         }
 
-        bp->pb_flags &= ~PBF_NONE;
+        if (page_count)
+                bp->pb_flags &= ~PBF_NONE;
 
         PB_TRACE(bp, "lookup_pages", (long)page_count);
         return error;