From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Date: Wed, 25 Feb 2009 17:59:26 +0000 (-0800)
Subject: sched_rt: don't start timer when rt bandwidth disabled
X-Git-Tag: firefly_0821_release~15387^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cac64d00c256e65776d575e82aaf540632b66178;p=firefly-linux-kernel-4.4.55.git

sched_rt: don't start timer when rt bandwidth disabled

Impact: fix incorrect condition check

No need to start rt bandwidth timer when rt bandwidth is disabled.
If this timer starts, it may stop at sched_rt_period_timer() on the first time.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/sched.c b/kernel/sched.c
index 410eec404133..c3baa9653d1d 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -223,7 +223,7 @@ static void start_rt_bandwidth(struct rt_bandwidth *rt_b)
 {
 	ktime_t now;
 
-	if (rt_bandwidth_enabled() && rt_b->rt_runtime == RUNTIME_INF)
+	if (!rt_bandwidth_enabled() || rt_b->rt_runtime == RUNTIME_INF)
 		return;
 
 	if (hrtimer_active(&rt_b->rt_period_timer))