block: defer timeouts to a workqueue

[mirror_ubuntu-bionic-kernel.git] / block / blk-timeout.c

diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index 3610af5617488a9dbfec02511972c8f52d75f20f..dd4fdfbcb3dd81c28f158980bed8cc83ffc82378 100644 (file)
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -127,13 +127,16 @@ static void blk_rq_check_expired(struct request *rq, unsigned long *next_timeout
        }
 }
 
-void blk_rq_timed_out_timer(unsigned long data)
+void blk_timeout_work(struct work_struct *work)
 {
-       struct request_queue *q = (struct request_queue *) data;
+       struct request_queue *q =
+               container_of(work, struct request_queue, timeout_work);
        unsigned long flags, next = 0;
        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)
@@ -143,6 +146,7 @@ void blk_rq_timed_out_timer(unsigned long data)
                mod_timer(&q->timeout, round_jiffies_up(next));
 
        spin_unlock_irqrestore(q->queue_lock, flags);
+       blk_queue_exit(q);
 }
 
 /**