On Sun, Mar 18, 2012 at 01:18:21PM +0000, Bart Van Assche wrote:
> All queued requests must be processed eventually. Hence make sure
> that blk_drain_queue() drains the queue even if the queue is in the
> stopped state. This patch makes it safe to invoke blk_cleanup_queue()
> on a stopped queue.
...
> diff --git a/block/blk-core.c b/block/blk-core.c
> index 3a78b00..bdcec86 100644
> --- a/block/blk-core.c
> +++ b/block/blk-core.c
> @@ -300,10 +300,8 @@ EXPORT_SYMBOL(blk_sync_queue);
> */
> void __blk_run_queue(struct request_queue *q)
> {
> - if (unlikely(blk_queue_stopped(q)))
> - return;
> -
> - q->request_fn(q);
> + if (!blk_queue_stopped(q) || blk_queue_dead(q))
> + q->request_fn(q);
So, this allows calling request_fn for dead && stopped queue. Have
you seen something which requires this?
Thanks.
--
tejun
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