This is a note to let you know that I've just added the patch titled
PM / devfreq: Fix wrong trans_stat of passive devfreq device
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pm-devfreq-fix-wrong-trans_stat-of-passive-devfreq-device.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 30582c25a4b4e0a5e456a309fde79b845e9473b2 Mon Sep 17 00:00:00 2001
From: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
Date: Tue, 31 Jan 2017 15:38:17 +0900
Subject: PM / devfreq: Fix wrong trans_stat of passive devfreq device
From: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
commit 30582c25a4b4e0a5e456a309fde79b845e9473b2 upstream.
Until now, the trans_stat information of passive devfreq is not updated.
This patch updates the trans_stat information after setting the target
frequency of passive devfreq device.
Fixes: 996133119f57 ("PM / devfreq: Add new passive governor")
Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
Signed-off-by: MyungJoo Ham <myungjoo.ham@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/devfreq/devfreq.c | 3 ++-
drivers/devfreq/governor.h | 2 ++
drivers/devfreq/governor_passive.c | 5 +++++
3 files changed, 9 insertions(+), 1 deletion(-)
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -130,7 +130,7 @@ static void devfreq_set_freq_table(struc
* @devfreq: the devfreq instance
* @freq: the update target frequency
*/
-static int devfreq_update_status(struct devfreq *devfreq, unsigned long freq)
+int devfreq_update_status(struct devfreq *devfreq, unsigned long freq)
{
int lev, prev_lev, ret = 0;
unsigned long cur_time;
@@ -166,6 +166,7 @@ out:
devfreq->last_stat_updated = cur_time;
return ret;
}
+EXPORT_SYMBOL(devfreq_update_status);
/**
* find_devfreq_governor() - find devfreq governor from name
--- a/drivers/devfreq/governor.h
+++ b/drivers/devfreq/governor.h
@@ -38,4 +38,6 @@ extern void devfreq_interval_update(stru
extern int devfreq_add_governor(struct devfreq_governor *governor);
extern int devfreq_remove_governor(struct devfreq_governor *governor);
+extern int devfreq_update_status(struct devfreq *devfreq, unsigned long freq);
+
#endif /* _GOVERNOR_H */
--- a/drivers/devfreq/governor_passive.c
+++ b/drivers/devfreq/governor_passive.c
@@ -112,6 +112,11 @@ static int update_devfreq_passive(struct
if (ret < 0)
goto out;
+ if (devfreq->profile->freq_table
+ && (devfreq_update_status(devfreq, freq)))
+ dev_err(&devfreq->dev,
+ "Couldn't update frequency transition information.\n");
+
devfreq->previous_freq = freq;
out:
Patches currently in stable-queue which might be from cw00.choi@xxxxxxxxxxx are
queue-4.9/pm-devfreq-fix-wrong-trans_stat-of-passive-devfreq-device.patch
queue-4.9/pm-devfreq-fix-available_governor-sysfs.patch