[PATCH] PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed

[Chanwoo Choi]

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")
Reported-by: Lin Huang <h...@rock-chips.com>
Signed-off-by: Chanwoo Choi <cw00.c...@samsung.com>
---
 drivers/devfreq/devfreq.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 1d6c803804d5..387799fec4c3 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -268,8 +268,11 @@ 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);
-- 
1.9.1