This is a note to let you know that I've just added the patch titled
PM / OPP: Move error message to debug level
to the 4.14-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-opp-move-error-message-to-debug-level.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Dec 20 18:17:52 CET 2017
From: Fabio Estevam <fabio.estevam@xxxxxxx>
Date: Fri, 29 Sep 2017 14:39:49 -0300
Subject: PM / OPP: Move error message to debug level
From: Fabio Estevam <fabio.estevam@xxxxxxx>
[ Upstream commit 035ed07208dc501d023873447113f3f178592156 ]
On some i.MX6 platforms which do not have speed grading
check, opp table will not be created in platform code,
so cpufreq driver prints the following error message:
cpu cpu0: dev_pm_opp_get_opp_count: OPP table not found (-19)
However, this is not really an error in this case because the
imx6q-cpufreq driver first calls dev_pm_opp_get_opp_count()
and if it fails, it means that platform code does not provide
OPP and then dev_pm_opp_of_add_table() will be called.
In order to avoid such confusing error message, move it to
debug level.
It is up to the caller of dev_pm_opp_get_opp_count() to check its
return value and decide if it will print an error or not.
Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/base/power/opp/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -296,7 +296,7 @@ int dev_pm_opp_get_opp_count(struct devi
opp_table = _find_opp_table(dev);
if (IS_ERR(opp_table)) {
count = PTR_ERR(opp_table);
- dev_err(dev, "%s: OPP table not found (%d)\n",
+ dev_dbg(dev, "%s: OPP table not found (%d)\n",
__func__, count);
return count;
}
Patches currently in stable-queue which might be from fabio.estevam@xxxxxxx are
queue-4.14/pm-opp-move-error-message-to-debug-level.patch