From dd840087086f3b93ac20f7472b4fca59aff7b79f Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@canonical.com>
Date: Fri, 15 Aug 2014 23:16:32 +0800
Subject: [PATCH] blk-mq: fix WARNING "percpu_ref_kill() called more than
 once!"

Before doing queue release, the queue has been freezed already
by blk_cleanup_queue(), so needn't to freeze queue for deleting
tag set.

This patch fixes the WARNING of "percpu_ref_kill() called more than once!"
which is triggered during unloading block driver.

Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
Reading git-format-patch failed