hctx is always released after requeue is freed.
With holding queue's kobject refcount, it is safe for driver to run queue,
so one run queue might be scheduled after blk_sync_queue() is done.
So moving the cancel of hctx->run_work into blk_mq_hw_sysfs_release()
for avoiding run released queue.
Cc: Dongli Zhang <dongli.zh...@oracle.com>
Cc: James Smart <james.sm...@broadcom.com>
Cc: Bart Van Assche <bart.vanass...@wdc.com>
Cc: linux-scsi@vger.kernel.org,
Cc: Martin K . Petersen <martin.peter...@oracle.com>,
Cc: Christoph Hellwig <h...@lst.de>,
Cc: James E . J . Bottomley <j...@linux.vnet.ibm.com>,
Reviewed-by: Bart Van Assche <bvanass...@acm.org>
Reviewed-by: Hannes Reinecke <h...@suse.com>
Tested-by: James Smart <james.sm...@broadcom.com>
Signed-off-by: Ming Lei <ming....@redhat.com>
---
block/blk-core.c | 8 --------
block/blk-mq-sysfs.c | 2 ++
2 files changed, 2 insertions(+), 8 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 2dd94b3e9ece..f5b5f21ae4fd 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -232,14 +232,6 @@ void blk_sync_queue(struct request_queue *q)
{
del_timer_sync(&q->timeout);
cancel_work_sync(&q->timeout_work);
-
- if (queue_is_mq(q)) {
- struct blk_mq_hw_ctx *hctx;
- int i;
-
- queue_for_each_hw_ctx(q, hctx, i)
- cancel_delayed_work_sync(&hctx->run_work);
- }
}
EXPORT_SYMBOL(blk_sync_queue);
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index 4040e62c3737..25c0d0a6a556 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -35,6 +35,8 @@ static void blk_mq_hw_sysfs_release(struct kobject *kobj)
struct blk_mq_hw_ctx *hctx = container_of(kobj, struct blk_mq_hw_ctx,
kobj);
+ cancel_delayed_work_sync(&hctx->run_work);
+
if (hctx->flags & BLK_MQ_F_BLOCKING)
cleanup_srcu_struct(hctx->srcu);
blk_free_flush_queue(hctx->fq);
--
2.9.5
