Re: [PATCH] Block: fix unbalanced bypass-disable in blk_register_queue

[Tejun Heo]

On Tue, Sep 09, 2014 at 11:50:58AM -0400, Alan Stern wrote:
> When a queue is registered, the block layer turns off the bypass
> setting (because bypass is enabled when the queue is created).  This
> doesn't work well for queues that are unregistered and then registered
> again; we get a WARNING because of the unbalanced calls to
> blk_queue_bypass_end().
> 
> This patch fixes the problem by making blk_register_queue() call
> blk_queue_bypass_end() only the first time the queue is registered.
> 
> Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> CC: Tejun Heo <tj@xxxxxxxxxx>
> CC: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
> CC: Jens Axboe <axboe@xxxxxxxxx>

Acked-by: Tejun Heo <tj@xxxxxxxxxx>

Thanks.

-- 
tejun
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