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authorChristoph Hellwig <hch@lst.de>2013-10-25 14:45:58 +0100
committerJens Axboe <axboe@kernel.dk>2013-10-25 14:45:58 +0100
commit280d45f6c35d8d7a0fe20c36caf426e3ac139cf9 (patch)
treeb3b059cfc6c43ce301fd7fc309f65ea888a9311a /block/blk-mq.c
parentf2298c0403b0dfcaef637eba0c02c4a06d7a25ab (diff)
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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 <hch@lst.de> Modified to just call blk_mq_stop_hw_queue() by Jens. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
-rw-r--r--block/blk-mq.c10
1 files changed, 10 insertions, 0 deletions
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);