diff options
Diffstat (limited to 'block/elevator.c')
| -rw-r--r-- | block/elevator.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/block/elevator.c b/block/elevator.c index f13d552a32c8..c355b55d0107 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -698,17 +698,26 @@ static int elevator_change(struct request_queue *q, const char *elevator_name) return 0; e = elevator_find_get(q, elevator_name); - if (!e) { - request_module("%s-iosched", elevator_name); - e = elevator_find_get(q, elevator_name); - if (!e) - return -EINVAL; - } + if (!e) + return -EINVAL; ret = elevator_switch(q, e); elevator_put(e); return ret; } +int elv_iosched_load_module(struct gendisk *disk, const char *buf, + size_t count) +{ + char elevator_name[ELV_NAME_MAX]; + + if (!elv_support_iosched(disk->queue)) + return -EOPNOTSUPP; + + strscpy(elevator_name, buf, sizeof(elevator_name)); + + return request_module("%s-iosched", strstrip(elevator_name)); +} + ssize_t elv_iosched_store(struct gendisk *disk, const char *buf, size_t count) { |