[PATCH] afs ->follow_link() fixes

* fixed leaks on failure exits
* got rid of useless struct nameidata instance
Signed-off-by: Al Viro <viro@parcelfarce.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/afs/mntpt.c

@@ -235,8 +235,8 @@ static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt)
  */
 static int afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
-	struct nameidata newnd;
 	struct vfsmount *newmnt;
+	struct dentry *old_dentry;
 	int err;
 
 	kenter("%p{%s},{%s:%p{%s}}",
@@ -247,15 +247,19 @@ static int afs_mntpt_follow_link(struct dentry *dentry, struct nameidata *nd)
 	       nd->dentry->d_name.name);
 
 	newmnt = afs_mntpt_do_automount(dentry);
-	if (IS_ERR(newmnt))
+	if (IS_ERR(newmnt)) {
+		path_release(nd);
 		return PTR_ERR(newmnt);
+	}
 
-	newnd = *nd;
-	newnd.dentry = dentry;
-	err = do_add_mount(newmnt, &newnd, 0, &afs_vfsmounts);
+	old_dentry = nd->dentry;
+	nd->dentry = dentry;
+	err = do_add_mount(newmnt, nd, 0, &afs_vfsmounts);
+	nd->dentry = old_dentry;
+
+	path_release(nd);
 
 	if (!err) {
-		path_release(nd);
 		mntget(newmnt);
 		nd->mnt = newmnt;
 		dget(newmnt->mnt_root);