From: Liu Bo <bo.li.liu@oracle.com>
Date: Mon, 5 Nov 2012 12:42:08 +0000 (+0000)
Subject: Btrfs: fix a deadlock in aborting transaction due to ENOSPC
X-Git-Tag: v3.8-rc1~71^2~88
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=37c4146d2208ba7e4463e8dd95a1bf9e3d865280;p=pandora-kernel.git

Btrfs: fix a deadlock in aborting transaction due to ENOSPC

When committing a transaction, we may bail out of running delayed refs
due to ENOSPC, and then abort the current transaction to flip into readonly.

But we'll hit a deadlock on ref head's lock since we forget to release
its lock and other cleanup stuff.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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