Commit fbd72127 authored by Aleksei Zakharov's avatar Aleksei Zakharov Committed by Jens Axboe
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block: avoid setting none scheduler if it's already none 



There's no reason to freeze queue and remove scheduler
if there's no scheduler already.

Signed-off-by: default avatarAleksei Zakharov <zakharov.a.g@yandex.ru>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent b7143fe6

block/elevator.c

+4 −1
Original line number Diff line number Diff line
@@ -667,8 +667,11 @@ static int __elevator_change(struct request_queue *q, const char *name) 
	/*

	 * Special case for mq, turn off scheduling

	 */

	if (!strncmp(name, "none", 4))

	if (!strncmp(name, "none", 4)) {

		if (!q->elevator)

			return 0;

		return elevator_switch(q, NULL);

	}



	strlcpy(elevator_name, name, sizeof(elevator_name));

	e = elevator_get(q, strstrip(elevator_name), true);