From: Chanwoo Choi <cw00.choi@samsung.com>
Date: Thu, 23 Jun 2016 02:18:43 +0000 (+0900)
Subject: UPSTREAM: PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is... 
X-Git-Tag: firefly_0821_release~1939
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c8076165ac390d4feb5ba49740bddb6517329d11;p=firefly-linux-kernel-4.4.55.git

UPSTREAM: PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed

This patch sends the DEVFREQ_POSTCHANGE notification when
devfreq->profile->targer() is failed. The PRECHANGE/POSTCHANGE
should be paired.

Fixes: 0fe3a66410a3 (PM / devfreq: Add new DEVFREQ_TRANSITION_NOTIFIER notifier)

Change-Id: I571fcc0ba95da6f7533d20818dfbd5f628c2f3ee
Reported-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit 0d37189e80163c653771916afe28fae1a8d14daa)
---

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 3fa315b46c1a..ffd35e327615 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -228,8 +228,11 @@ int update_devfreq(struct devfreq *devfreq)
 	devfreq_notify_transition(devfreq, &freqs, DEVFREQ_PRECHANGE);
 
 	err = devfreq->profile->target(devfreq->dev.parent, &freq, flags);
-	if (err)
+	if (err) {
+		freqs.new = cur_freq;
+		devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);
 		return err;
+	}
 
 	freqs.new = freq;
 	devfreq_notify_transition(devfreq, &freqs, DEVFREQ_POSTCHANGE);