Orangefs: choose return codes from among the expected ones.

Signed-off-by: Mike Marshall <hubcap@omnibond.com>
diff --git a/fs/orangefs/file.c b/fs/orangefs/file.c
index 3e5fc1a..53e58c3 100644
--- a/fs/orangefs/file.c
+++ b/fs/orangefs/file.c
@@ -973,7 +973,7 @@
  */
 static int pvfs2_lock(struct file *filp, int cmd, struct file_lock *fl)
 {
-	int rc = -ENOLCK;
+	int rc = -EINVAL;
 
 	if (PVFS2_SB(filp->f_inode->i_sb)->flags & PVFS2_OPT_LOCAL_LOCK) {
 		if (cmd == F_GETLK) {