ocfs2: fix d_splice_alias() return code checking

d_splice_alias() can return a valid dentry, NULL or an ERR_PTR.
Currently the code checks not for ERR_PTR and will cuase an oops in
ocfs2_dentry_attach_lock().  Fix this by using IS_ERR_OR_NULL().

Signed-off-by: Richard Weinberger <richard@nod.at>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 8add6f1..b931e04 100644 (file)
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -158,7 +158,7 @@ bail_add:
                 * NOTE: This dentry already has ->d_op set from
                 * ocfs2_get_parent() and ocfs2_get_dentry()
                 */
-               if (ret)
+               if (!IS_ERR_OR_NULL(ret))
                        dentry = ret;
 
                status = ocfs2_dentry_attach_lock(dentry, inode,