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cpufreq: powernv: Dont assume distinct pstate values for nominal and pmin

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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>
This commit is contained in:
Shilpasri G Bhat 2018-01-12 12:43:53 +05:30 committed by Greg Kroah-Hartman
parent ae34caee36
commit 9708d4743f
1 changed files with 2 additions and 2 deletions
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4
drivers/cpufreq/powernv-cpufreq.c
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@ -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;
}