2  * Functions related to generic timeout handling of requests.
140 		mod_timer(&q->timeout, round_jiffies_up(next));  in blk_timeout_work()
150  * request by deleting the timer and calling the q's timeout function.
151  * LLDDs who implement their own error recovery MAY ignore the timeout
158 		 * All we need to ensure is that timeout scan takes place  in blk_abort_request()
159 		 * immediately and that scan sees the new timeout value.  in blk_abort_request()
173 unsigned long blk_rq_timeout(unsigned long timeout)  in blk_rq_timeout()  argument
178 	if (time_after(timeout, maxt))  in blk_rq_timeout()
179 		timeout = maxt;  in blk_rq_timeout()
181 	return timeout;  in blk_rq_timeout()
185  * blk_add_timer - Start timeout timer for a single request
207 	 * Some LLDs, like scsi, peek at the timeout to prevent a  in blk_add_timer()
210 	if (!req->timeout)  in blk_add_timer()
211 		req->timeout = q->rq_timeout;  in blk_add_timer()
214 	blk_rq_set_deadline(req, jiffies + req->timeout);  in blk_add_timer()
224 	 * If the timer isn't already pending or this timeout is earlier  in blk_add_timer()
230 	if (!timer_pending(&q->timeout) ||  in blk_add_timer()
231 	    time_before(expiry, q->timeout.expires)) {  in blk_add_timer()
232 		unsigned long diff = q->timeout.expires - expiry;  in blk_add_timer()
241 		if (!timer_pending(&q->timeout) || (diff >= HZ / 2))  in blk_add_timer()
242 			mod_timer(&q->timeout, expiry);  in blk_add_timer()