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authorMing Lei <ming.lei@redhat.com>2017-06-06 23:22:10 +0800
committerJens Axboe <axboe@kernel.dk>2017-06-18 14:24:48 -0600
commit641a9ed60f3620936921a58fb21d9f3aa891f3a4 (patch)
tree36421200c74e648854f95f0d417910194ef2c056 /block/blk-mq.c
parent39a70c76b89b81db91a72a86b6c6a9b239013417 (diff)
downloadlinux-641a9ed60f3620936921a58fb21d9f3aa891f3a4.tar.bz2
Revert "blk-mq: don't use sync workqueue flushing from drivers"
This patch reverts commit 2719aa217e0d02(blk-mq: don't use sync workqueue flushing from drivers) because only blk_mq_quiesce_queue() need the sync flush, and now we don't need to stop queue any more, so revert it. Also changes to cancel_delayed_work() in blk_mq_stop_hw_queue(). Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
-rw-r--r--block/blk-mq.c30
1 files changed, 8 insertions, 22 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 89cbd022b1eb..dd276a9e138e 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -42,7 +42,6 @@ static LIST_HEAD(all_q_list);
static void blk_mq_poll_stats_start(struct request_queue *q);
static void blk_mq_poll_stats_fn(struct blk_stat_callback *cb);
-static void __blk_mq_stop_hw_queues(struct request_queue *q, bool sync);
static int blk_mq_poll_stats_bkt(const struct request *rq)
{
@@ -1194,16 +1193,6 @@ bool blk_mq_queue_stopped(struct request_queue *q)
}
EXPORT_SYMBOL(blk_mq_queue_stopped);
-static void __blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx, bool sync)
-{
- if (sync)
- cancel_delayed_work_sync(&hctx->run_work);
- else
- cancel_delayed_work(&hctx->run_work);
-
- set_bit(BLK_MQ_S_STOPPED, &hctx->state);
-}
-
/*
* This function is often used for pausing .queue_rq() by driver when
* there isn't enough resource or some conditions aren't satisfied, and
@@ -1215,18 +1204,11 @@ static void __blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx, bool sync)
*/
void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx)
{
- __blk_mq_stop_hw_queue(hctx, false);
-}
-EXPORT_SYMBOL(blk_mq_stop_hw_queue);
+ cancel_delayed_work(&hctx->run_work);
-static void __blk_mq_stop_hw_queues(struct request_queue *q, bool sync)
-{
- struct blk_mq_hw_ctx *hctx;
- int i;
-
- queue_for_each_hw_ctx(q, hctx, i)
- __blk_mq_stop_hw_queue(hctx, sync);
+ set_bit(BLK_MQ_S_STOPPED, &hctx->state);
}
+EXPORT_SYMBOL(blk_mq_stop_hw_queue);
/*
* This function is often used for pausing .queue_rq() by driver when
@@ -1239,7 +1221,11 @@ static void __blk_mq_stop_hw_queues(struct request_queue *q, bool sync)
*/
void blk_mq_stop_hw_queues(struct request_queue *q)
{
- __blk_mq_stop_hw_queues(q, false);
+ 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);