From b0c24c3bdf237182b2f043bfee68bf886b0c9ad3 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 18 Apr 2015 19:10:36 -0400
Subject: [PATCH] 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>
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