diff options
| -rw-r--r-- | block/elevator.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/block/elevator.c b/block/elevator.c index f05e90d4e695..d6d835a08de6 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -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); |