From f5ec592dd3bcf7c91f7c262a7f5011e001d269cd Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Mon, 24 Jan 2022 13:59:36 -0800 Subject: block: simplify calling convention of elv_unregister_queue() Make elv_unregister_queue() a no-op if q->elevator is NULL or is not registered. This simplifies the existing callers, as well as the future caller in the error path of blk_register_queue(). Also don't bother checking whether q is NULL, since it never is. Reviewed-by: Hannes Reinecke Reviewed-by: Bart Van Assche Signed-off-by: Eric Biggers Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20220124215938.2769-2-ebiggers@kernel.org Signed-off-by: Jens Axboe --- block/elevator.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'block/elevator.c') diff --git a/block/elevator.c b/block/elevator.c index 6847ab6e7aa5..a842e4b8ebc6 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -516,9 +516,11 @@ int elv_register_queue(struct request_queue *q, bool uevent) void elv_unregister_queue(struct request_queue *q) { + struct elevator_queue *e = q->elevator; + lockdep_assert_held(&q->sysfs_lock); - if (q) { + if (e && e->registered) { struct elevator_queue *e = q->elevator; kobject_uevent(&e->kobj, KOBJ_REMOVE); @@ -593,9 +595,7 @@ int elevator_switch_mq(struct request_queue *q, lockdep_assert_held(&q->sysfs_lock); if (q->elevator) { - if (q->elevator->registered) - elv_unregister_queue(q); - + elv_unregister_queue(q); ioc_clear_queue(q); blk_mq_sched_free_rqs(q); elevator_exit(q); -- cgit v1.2.3