block, bfq: fix error handle in bfq_init

if elv_register fail, bfq_pool should be free.

Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 509f399..ea2832b 100644 (file)
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -5062,10 +5062,12 @@ static int __init bfq_init(void)
 
        ret = elv_register(&iosched_bfq_mq);
        if (ret)
-               goto err_pol_unreg;
+               goto slab_kill;
 
        return 0;
 
+slab_kill:
+       bfq_slab_kill();
 err_pol_unreg:
 #ifdef CONFIG_BFQ_GROUP_IOSCHED
        blkcg_policy_unregister(&blkcg_policy_bfq);