00848238 +0800
committer Li Zefan <lizf@cn.fujitsu.com> 1302675931 +0800

Btrfs: Check if btrfs_next_leaf() returns error in btrfs_real_readdir()

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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