tree 43817ee93cf8c5baca17958ec6d93c5e4fe7d1a6
parent b7143fe67bfc3b83a9e11371da659e1e70a1bbf3
author Aleksei Zakharov <zakharov.a.g@yandex.ru> 1549882237 +0300
committer Jens Axboe <axboe@kernel.dk> 1549898500 -0700

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: Aleksei Zakharov <zakharov.a.g@yandex.ru>
Signed-off-by: Jens Axboe <axboe@kernel.dk>