From: Christoph Hellwig Date: Fri, 25 Oct 2013 13:45:58 +0000 (+0100) Subject: blk-mq: add blk_mq_stop_hw_queues X-Git-Tag: firefly_0821_release~176^2~4955^2~4^2~3 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=280d45f6c35d8d7a0fe20c36caf426e3ac139cf9;p=firefly-linux-kernel-4.4.55.git blk-mq: add blk_mq_stop_hw_queues Add a helper to iterate over all hw queues and stop them. This is useful for driver that implement PM suspend functionality. Signed-off-by: Christoph Hellwig Modified to just call blk_mq_stop_hw_queue() by Jens. Signed-off-by: Jens Axboe --- diff --git a/block/blk-mq.c b/block/blk-mq.c index f21ec964e411..ac804c635040 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -672,6 +672,16 @@ void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx) } EXPORT_SYMBOL(blk_mq_stop_hw_queue); +void blk_mq_stop_hw_queues(struct request_queue *q) +{ + struct blk_mq_hw_ctx *hctx; + int i; + + queue_for_each_hw_ctx(q, hctx, i) + blk_mq_stop_hw_queue(hctx); +} +EXPORT_SYMBOL(blk_mq_stop_hw_queues); + void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx) { clear_bit(BLK_MQ_S_STOPPED, &hctx->state); diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 746042ff321a..3368b97bee73 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -136,6 +136,7 @@ void blk_mq_end_io(struct request *rq, int error); 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_stopped_hw_queues(struct request_queue *q); /*