From 573a075567f0174551e2fad2a3164afd2af788f2 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@fb.com>
Date: Thu, 27 Mar 2014 19:41:34 -0400
Subject: [PATCH] Btrfs: check for an extent_op on the locked ref

We could have possibly added an extent_op to the locked_ref while we dropped
locked_ref->lock, so check for this case as well and loop around.  Otherwise we
could lose flag updates which would lead to extent tree corruption.  Thanks,

cc: stable@vger.kernel.org
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
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