This is a note to let you know that I've just added the patch titled
cpufreq: amd_pstate: fix wrong lowest perf fetch
to the 6.0-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-amd_pstate-fix-wrong-lowest-perf-fetch.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d6187669e61fb32ccc9e516ce5fff0c186cfffa6
Author: Perry Yuan <Perry.Yuan@xxxxxxx>
Date: Mon Aug 15 00:35:45 2022 +0800
cpufreq: amd_pstate: fix wrong lowest perf fetch
[ Upstream commit b185c5053c65b7704ead4537e4d4d9b33dc398dc ]
Fix the wrong lowest perf value reading which is used for new
des_perf calculation by governor requested, the incorrect min_perf will
get incorrect des_perf to be set , that will cause the system frequency
changing unexpectedly.
Reviewed-by: Huang Rui <ray.huang@xxxxxxx>
Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Perry Yuan <Perry.Yuan@xxxxxxx>
Signed-off-by: Su Jinzhou <jinzhou.su@xxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 365f3ad166a7..d63a28c5f95a 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -322,7 +322,7 @@ static int amd_pstate_target(struct cpufreq_policy *policy,
return -ENODEV;
cap_perf = READ_ONCE(cpudata->highest_perf);
- min_perf = READ_ONCE(cpudata->lowest_nonlinear_perf);
+ min_perf = READ_ONCE(cpudata->lowest_perf);
max_perf = cap_perf;
freqs.old = policy->cur;
