Make sure that if the timeout timer fires after a queue has been
marked "dying" that the affected requests are finished.
Reported-by: chenxiang (M) <chenxiang66@xxxxxxxxxxxxx>
Fixes: commit 287922eb0b18 ("block: defer timeouts to a workqueue")
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxx>
Tested-by: chenxiang (M) <chenxiang66@xxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Cc: Hannes Reinecke <hare@xxxxxxxx>
Cc: Ming Lei <ming.lei@xxxxxxxxxx>
Cc: Johannes Thumshirn <jthumshirn@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
---
block/blk-core.c | 2 ++
block/blk-timeout.c | 3 ---
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index e8e149ccc86b..bb4fce694a60 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -333,6 +333,7 @@ EXPORT_SYMBOL(blk_stop_queue);
void blk_sync_queue(struct request_queue *q)
{
del_timer_sync(&q->timeout);
+ cancel_work_sync(&q->timeout_work);
if (q->mq_ops) {
struct blk_mq_hw_ctx *hctx;
@@ -844,6 +845,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
setup_timer(&q->backing_dev_info->laptop_mode_wb_timer,
laptop_mode_timer_fn, (unsigned long) q);
setup_timer(&q->timeout, blk_rq_timed_out_timer, (unsigned long) q);
+ INIT_WORK(&q->timeout_work, NULL);
INIT_LIST_HEAD(&q->queue_head);
INIT_LIST_HEAD(&q->timeout_list);
INIT_LIST_HEAD(&q->icq_list);
diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index e3e9c9771d36..764ecf9aeb30 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -134,8 +134,6 @@ void blk_timeout_work(struct work_struct *work)
struct request *rq, *tmp;
int next_set = 0;
- if (blk_queue_enter(q, true))
- return;
spin_lock_irqsave(q->queue_lock, flags);
list_for_each_entry_safe(rq, tmp, &q->timeout_list, timeout_list)
@@ -145,7 +143,6 @@ void blk_timeout_work(struct work_struct *work)
mod_timer(&q->timeout, round_jiffies_up(next));
spin_unlock_irqrestore(q->queue_lock, flags);
- blk_queue_exit(q);
}
/**
--
2.14.2