blk-mq: update nr_requests when switching to 'none' scheduler
Now we setup q->nr_requests when switching to one new scheduler,
but not do it for 'none', then q->nr_requests may not be correct
for 'none'.
This patch fixes this issue by always updating 'nr_requests' when
switching to 'none'.
Cc: Marco Patalano <mpatalan@redhat.com>
Cc: "Ewan D. Milne" <emilne@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index b1f0608..56c493c 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -585,6 +585,7 @@
if (!e) {
q->elevator = NULL;
+ q->nr_requests = q->tag_set->queue_depth;
return 0;
}