From 2e6a00356a066d34cd00872b067589549169ad48 Mon Sep 17 00:00:00 2001
From: Li Zefan <lizf@cn.fujitsu.com>
Date: Thu, 17 Mar 2011 15:17:59 +0800
Subject: [PATCH] Btrfs: Check if btrfs_next_leaf() returns error in
 btrfs_listxattr()

btrfs_next_leaf() can return -errno, and we should propagate
it to userspace.

This also simplifies how we walk the btree path.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
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