From 340ff3216799a947fe0b07bed8f0409ffc716be9 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 10 May 2017 07:40:04 -0600 Subject: [PATCH] elevator: remove redundant warnings on IO scheduler switch We warn twice for switching to a scheduler, if that switch fails. As we also report the failure in the return value to the sysfs write, remove the dmesg induced failures. Keep the failure print for warning to switch to the kconfig selected IO scheduler, as we can't report errors for that in any other way. Signed-off-by: Jens Axboe --- block/elevator.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/block/elevator.c b/block/elevator.c index ab726a5c0bf6..dac99fbfc273 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -1062,10 +1062,8 @@ static int __elevator_change(struct request_queue *q, const char *name) strlcpy(elevator_name, name, sizeof(elevator_name)); e = elevator_get(strstrip(elevator_name), true); - if (!e) { - printk(KERN_ERR "elevator: type %s not found\n", elevator_name); + if (!e) return -EINVAL; - } if (q->elevator && !strcmp(elevator_name, q->elevator->type->elevator_name)) { @@ -1105,7 +1103,6 @@ ssize_t elv_iosched_store(struct request_queue *q, const char *name, if (!ret) return count; - printk(KERN_ERR "elevator: switch to %s failed\n", name); return ret; }