From 19008f6dfa16d23afcd09dceaa598bb6da8de4b1 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Sun, 31 Aug 2014 15:03:14 -0400
Subject: [PATCH] ext4: fix ext4_swap_extents() error handling

If ext4_ext_find_extent() returns an error, we have to clear path1 or
path2 or else we would end up trying to free an ERR_PTR, which would
be bad.

Also eliminate some redundant code and mark the error paths as unlikely()

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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