From: Amit Shah <amit.shah@redhat.com>
Date: Mon, 29 Jul 2013 04:54:15 +0000 (+0930)
Subject: virtio: console: add locking in port unplug path
X-Git-Tag: v3.12-rc1~85^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5549fb25811710585d5ec77a0e6a1fbc8808df93;p=pandora-kernel.git

virtio: console: add locking in port unplug path

Port unplug can race with close() in port_fops_release().
port_fops_release() already takes the necessary locks, ensure
unplug_port() does that too.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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