From: Dmitry Monakhov <dmonakhov@openvz.org>
Date: Wed, 28 Apr 2010 17:50:33 +0000 (+0200)
Subject: cfq-iosched: fix broken cfq_ref_get_cfqf() for CONFIG_BLK_CGROUP=y && CFQ_GROUP_IOSCHED=n
X-Git-Tag: firefly_0821_release~9833^2~2056^2~63
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=50eaeb323a170e231263ccb433bb2f99bd9e27ac;p=firefly-linux-kernel-4.4.55.git

cfq-iosched: fix broken cfq_ref_get_cfqf() for CONFIG_BLK_CGROUP=y && CFQ_GROUP_IOSCHED=n

We should return the cfq_group for this case, not NULL.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 286008cf889e..0f3eb70f9ce1 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1094,7 +1094,7 @@ static struct cfq_group *cfq_get_cfqg(struct cfq_data *cfqd, int create)
 
 static inline struct cfq_group *cfq_ref_get_cfqg(struct cfq_group *cfqg)
 {
-	return NULL;
+	return cfqg;
 }
 
 static inline void