From: Tejun Heo <tj@kernel.org>
Date: Thu, 29 Aug 2019 15:53:06 +0000 (-0700)
Subject: blkcg: fix missing free on error path of blk_iocost_init()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=3532e7227243beb0b782266dc05c40b6184ad051;p=linux.git

blkcg: fix missing free on error path of blk_iocost_init()

blk_iocost_init() forgot to free its percpu stat on the error path.
Fix it.

Fixes: 7caa47151ab2 ("blkcg: implement blk-iocost")
Reported-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index f04a4ed1cb45a..9c8046ac5925a 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -1876,6 +1876,7 @@ static int blk_iocost_init(struct request_queue *q)
 	ret = blkcg_activate_policy(q, &blkcg_policy_iocost);
 	if (ret) {
 		rq_qos_del(q, rqos);
+		free_percpu(ioc->pcpu_stat);
 		kfree(ioc);
 		return ret;
 	}