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intel_pstate: Correct calculation of min pstate value

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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>
This commit is contained in:
Dirk Brandewie 2013-10-21 09:20:33 -07:00 • committed by Rafael J. Wysocki
parent d253d2a526
commit 7244cb62d9
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) static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
{ {
int max_perf = cpu->pstate.turbo_pstate; int max_perf = cpu->pstate.turbo_pstate;
int max_perf_adj;
int min_perf; int min_perf;
if (limits.no_turbo) if (limits.no_turbo)
max_perf = cpu->pstate.max_pstate; max_perf = cpu->pstate.max_pstate;
max_perf = fp_toint(mul_fp(int_tofp(max_perf), limits.max_perf)); max_perf_adj = fp_toint(mul_fp(int_tofp(max_perf), limits.max_perf));
*max = clamp_t(int, max_perf, *max = clamp_t(int, max_perf_adj,
cpu->pstate.min_pstate, cpu->pstate.turbo_pstate); cpu->pstate.min_pstate, cpu->pstate.turbo_pstate);
min_perf = fp_toint(mul_fp(int_tofp(max_perf), limits.min_perf)); min_perf = fp_toint(mul_fp(int_tofp(max_perf), limits.min_perf));