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elevator: remove redundant warnings on IO scheduler switch

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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 <axboe@fb.com>
This commit is contained in:
Jens Axboe 2017-05-10 07:40:04 -06:00
parent 43c1b3d6e5
commit 340ff32167
1 changed files with 1 additions and 4 deletions
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5
block/elevator.c
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@ -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;
}