-static void blk_rq_timed_out(struct request *req)
-{
- struct request_queue *q = req->q;
- enum blk_eh_timer_return ret = BLK_EH_RESET_TIMER;
-
- if (q->rq_timed_out_fn)
- ret = q->rq_timed_out_fn(req);
- switch (ret) {
- case BLK_EH_RESET_TIMER:
- blk_add_timer(req);
- blk_clear_rq_complete(req);
- break;
- case BLK_EH_DONE:
- /*
- * LLD handles this for now but in the future
- * we can send a request msg to abort the command
- * and we can move more of the generic scsi eh code to
- * the blk layer.
- */
- break;
- default:
- printk(KERN_ERR "block: bad eh return: %d\n", ret);
- break;
- }
-}
-
-static void blk_rq_check_expired(struct request *rq, unsigned long *next_timeout,
- unsigned int *next_set)
-{
- const unsigned long deadline = blk_rq_deadline(rq);
-
- if (time_after_eq(jiffies, deadline)) {
- list_del_init(&rq->timeout_list);
-
- /*
- * Check if we raced with end io completion
- */
- if (!blk_mark_rq_complete(rq))
- blk_rq_timed_out(rq);
- } else if (!*next_set || time_after(*next_timeout, deadline)) {
- *next_timeout = deadline;
- *next_set = 1;
- }
-}
-
-void blk_timeout_work(struct work_struct *work)
-{
- 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;
-
- spin_lock_irqsave(q->queue_lock, flags);
-
- list_for_each_entry_safe(rq, tmp, &q->timeout_list, timeout_list)
- blk_rq_check_expired(rq, &next, &next_set);
-
- if (next_set)
- mod_timer(&q->timeout, round_jiffies_up(next));
-
- spin_unlock_irqrestore(q->queue_lock, flags);
-}
-