4.14-stable review patch. If anyone has any objections, please let me know.
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From: Shilpasri G Bhat shilpa.bhat@linux.vnet.ibm.com
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@tw.ibm.com Signed-off-by: Shilpasri G Bhat shilpa.bhat@linux.vnet.ibm.com Acked-by: Viresh Kumar viresh.kumar@linaro.org Cc: 4.8+ stable@vger.kernel.org # 4.8+ Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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 @@ -287,9 +287,9 @@ next:
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) {