From 55e591ffde38e0088b022129e035e18a8d04c7e6 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 30 Jul 2012 02:15:15 -0600
Subject: [PATCH] Btrfs: unlock on error in btrfs_delalloc_reserve_metadata()

We should release this mutex before returning the error code.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
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