From: Filipe Manana <fdmanana@suse.com>
Date: Thu, 30 Apr 2015 16:47:05 +0000 (+0100)
Subject: Btrfs: fix mutex unlock without prior lock on space cache truncation
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~69^2~53
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=35c766425adc8e6cd1bdc8554fa540364f218fb7;p=pandora-kernel.git

Btrfs: fix mutex unlock without prior lock on space cache truncation

If the call to btrfs_truncate_inode_items() failed and we don't have a block
group, we were unlocking the cache_write_mutex without having locked it (we
do it only if we have a block group).

Fixes: 1bbc621ef284 ("Btrfs: allow block group cache writeout
                      outside critical section in commit")

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
---

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