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Commit ae911c5e authored by Jens Axboe's avatar Jens Axboe
Browse files

blk-mq: add blk_mq_start_stopped_hw_queue() 



We have a variant for all hardware queues, but not one for a single
hardware queue.

Signed-off-by: default avatarJens Axboe <axboe@fb.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
parent f9d03f96

block/blk-mq.c

+12 −7
Original line number Diff line number Diff line
@@ -1064,18 +1064,23 @@ void blk_mq_start_hw_queues(struct request_queue *q) 
}

EXPORT_SYMBOL(blk_mq_start_hw_queues);



void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async)

void blk_mq_start_stopped_hw_queue(struct blk_mq_hw_ctx *hctx, bool async)

{

	struct blk_mq_hw_ctx *hctx;

	int i;



	queue_for_each_hw_ctx(q, hctx, i) {

	if (!blk_mq_hctx_stopped(hctx))

			continue;

		return;



	clear_bit(BLK_MQ_S_STOPPED, &hctx->state);

	blk_mq_run_hw_queue(hctx, async);

}

EXPORT_SYMBOL_GPL(blk_mq_start_stopped_hw_queue);



void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async)

{

	struct blk_mq_hw_ctx *hctx;

	int i;



	queue_for_each_hw_ctx(q, hctx, i)

		blk_mq_start_stopped_hw_queue(hctx, async);

}

EXPORT_SYMBOL(blk_mq_start_stopped_hw_queues);

include/linux/blk-mq.h

+1 −0
Original line number Diff line number Diff line
@@ -231,6 +231,7 @@ void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx); 
void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx);

void blk_mq_stop_hw_queues(struct request_queue *q);

void blk_mq_start_hw_queues(struct request_queue *q);

void blk_mq_start_stopped_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);

void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async);

void blk_mq_run_hw_queues(struct request_queue *q, bool async);

void blk_mq_delay_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs);