This is a note to let you know that I've just added the patch titled
cpufreq: powernv: Dont assume distinct pstate values for nominal and pmin
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:
cpufreq-powernv-dont-assume-distinct-pstate-values-for-nominal-and-pmin.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 3fa4680b860bf48b437d6a2c039789c4abe202ae Mon Sep 17 00:00:00 2001
From: Shilpasri G Bhat <shilpa.bhat@xxxxxxxxxxxxxxxxxx>
Date: Fri, 12 Jan 2018 12:43:53 +0530
Subject: cpufreq: powernv: Dont assume distinct pstate values for nominal and pmin
From: Shilpasri G Bhat <shilpa.bhat@xxxxxxxxxxxxxxxxxx>
commit 3fa4680b860bf48b437d6a2c039789c4abe202ae upstream.
Some OpenPOWER boxes can have same pstate values for nominal and
pmin pstates. In these boxes the current code will not initialize
'powernv_pstate_info.min' variable and result in erroneous CPU
frequency reporting. This patch fixes this problem.
Fixes: 09ca4c9b5958 (cpufreq: powernv: Replacing pstate_id with frequency table index)
Reported-by: Alvin Wang <wangat@xxxxxxxxxx>
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@xxxxxxxxxxxxxxxxxx>
Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Cc: 4.8+ <stable@xxxxxxxxxxxxxxx> # 4.8+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/cpufreq/powernv-cpufreq.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/cpufreq/powernv-cpufreq.c
+++ b/drivers/cpufreq/powernv-cpufreq.c
@@ -260,9 +260,9 @@ static int init_powernv_pstates(void)
if (id == pstate_max)
powernv_pstate_info.max = i;
- else if (id == pstate_nominal)
+ if (id == pstate_nominal)
powernv_pstate_info.nominal = i;
- else if (id == pstate_min)
+ if (id == pstate_min)
powernv_pstate_info.min = i;
}
Patches currently in stable-queue which might be from shilpa.bhat@xxxxxxxxxxxxxxxxxx are
queue-4.9/cpufreq-powernv-dont-assume-distinct-pstate-values-for-nominal-and-pmin.patch