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intel_pstate: Correct calculation of min pstate value

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commit 7244cb62d9 upstream.

The minimum pstate is supposed to be a percentage of the maximum P
state available.  Calculate min using max pstate and not the
current max which may have been limited by the user

Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
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:
Dirk Brandewie
2013-10-21 09:20:33 -07:00
committed by Greg Kroah-Hartman
parent e34ce30f32
commit 0df520d459
1 changed files with 3 additions and 2 deletions
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5
drivers/cpufreq/intel_pstate.c
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@@ -366,12 +366,13 @@ static int intel_pstate_turbo_pstate(void)
static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
{
int max_perf = cpu->pstate.turbo_pstate;
int max_perf_adj;
int min_perf;
if (limits.no_turbo)
max_perf = cpu->pstate.max_pstate;
max_perf = fp_toint(mul_fp(int_tofp(max_perf), limits.max_perf));
*max = clamp_t(int, max_perf,
max_perf_adj = fp_toint(mul_fp(int_tofp(max_perf), limits.max_perf));
*max = clamp_t(int, max_perf_adj,
cpu->pstate.min_pstate, cpu->pstate.turbo_pstate);
min_perf = fp_toint(mul_fp(int_tofp(max_perf), limits.min_perf));