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From: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
To: rjw@rjwysocki.net
Cc: viresh.kumar@linaro.org, mpe@ellerman.id.au,
	linux-pm@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-kernel@vger.kernel.org, ego@linux.vnet.ibm.com,
	svaidy@linux.vnet.ibm.com, akshay.adiga@linux.vnet.ibm.com,
	huntbag@linux.vnet.ibm.com,
	Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Subject: [PATCH] cpufreq: powernv: Dont assume distinct pstate values for nominal and pmin
Date: Fri, 12 Jan 2018 12:43:53 +0530	[thread overview]
Message-ID: <1515741233-1442-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> (raw)

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@tw.ibm.com>
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
---
 drivers/cpufreq/powernv-cpufreq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c
index b6d7c4c..da7fdb4 100644
--- a/drivers/cpufreq/powernv-cpufreq.c
+++ b/drivers/cpufreq/powernv-cpufreq.c
@@ -288,9 +288,9 @@ 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;
 
 		if (powernv_pstate_info.wof_enabled && id == pstate_turbo) {
-- 
1.8.3.1

             reply	other threads:[~2018-01-12  7:14 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-12  7:13 Shilpasri G Bhat [this message]
2018-01-12  9:07 ` [PATCH] cpufreq: powernv: Dont assume distinct pstate values for nominal and pmin Viresh Kumar

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