From 280d45f6c35d8d7a0fe20c36caf426e3ac139cf9 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 25 Oct 2013 14:45:58 +0100 Subject: [PATCH] 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 --- block/blk-mq.c | 10 ++++++++++ include/linux/blk-mq.h | 1 + 2 files changed, 11 insertions(+) diff --git a/block/blk-mq.c b/block/blk-mq.c index f21ec96..ac804c6 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 746042ff..3368b97 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); /* -- 2.7.4