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Patch "PM / devfreq: Fix wrong trans_stat of passive devfreq device" has been added to the 4.9-stable tree

PATCH [email protected] 1 participant 1 message Mar 8, 2017

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Stable branch Device frequency (devfreq)
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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 <[email protected]> know about it.

Quoted 1 line

From 30582c25a4b4e0a5e456a309fde79b845e9473b2 Mon Sep 17 00:00:00 2001

From: Chanwoo Choi <[email protected]>
Date: Tue, 31 Jan 2017 15:38:17 +0900
Subject: PM / devfreq: Fix wrong trans_stat of passive devfreq device

From: Chanwoo Choi <[email protected]>

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 <[email protected]>
Signed-off-by MyungJoo Ham <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/devfreq/devfreq.c          |    3 ++-
 drivers/devfreq/governor.h         |    2 ++
 drivers/devfreq/governor_passive.c |    5 +++++
 3 files changed, 9 insertions(+), 1 deletion(-)
drivers/devfreq/devfreq.c +2 -1
@@ -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
drivers/devfreq/governor.h +2 -0
@@ -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 */
drivers/devfreq/governor_passive.c +5 -0
@@ -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 [email protected] 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