From: Ilya Dryomov <idryomov@gmail.com>
Date: Thu, 10 Oct 2013 17:37:29 +0000 (+0300)
Subject: Btrfs: nuke a bogus rw_devices decrement in __btrfs_close_devices
X-Git-Tag: v3.13-rc1~85^2~52
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f747cab7b75ba298df3ac234de9f1655957786cc;p=pandora-kernel.git

Btrfs: nuke a bogus rw_devices decrement in __btrfs_close_devices

On mount failures, __btrfs_close_devices can be called well before
dev-replace state is read and ->is_tgtdev_for_dev_replace is set.  This
leads to a bogus decrement of ->rw_devices and sets off a WARN_ON in
__btrfs_close_devices if replace target device happens to be on the
lists and we fail early in the mount sequence.  Fix this by checking
the devid instead of ->is_tgtdev_for_dev_replace before the decrement:
for replace targets devid is always equal to BTRFS_DEV_REPLACE_DEVID.

Cc: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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