link_path_walk: handle get_link() returning ERR_PTR() immediately

If we get ERR_PTR() from get_link(), we are guaranteed to get err != 0
when we break out of do-while, so we are going to hit if (err) return err;
shortly after it.  Pull that into the if (IS_ERR(s)) body.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/namei.c b/fs/namei.c
index d729ef7..9937470 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1792,7 +1792,9 @@ static int link_path_walk(const char *name, struct nameidata *nd)
 
                                if (unlikely(IS_ERR(s))) {
                                        err = PTR_ERR(s);
-                                       break;
+                                       current->link_count--;
+                                       nd->depth--;
+                                       return err;
                                }
                                err = 0;
                                if (likely(s)) {