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authorDirk Brandewie <dirk.j.brandewie@intel.com>2013-10-21 09:20:33 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-13 13:48:04 -0800
commit0df520d4597fedba4eeea99726919d2ecf0452e9 (patch)
treea85ec12df3b4c415febf0c9a890693b5bb022dc2
parente34ce30f3226936bf8f43dc3d2616acd268a8cd2 (diff)
downloadlinaro-lsk-0df520d4597fedba4eeea99726919d2ecf0452e9.tar.gz
intel_pstate: Correct calculation of min pstate value
commit 7244cb62d96e735847dc9d08f870550df896898c 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>
-rw-r--r--drivers/cpufreq/intel_pstate.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index f82563d7a7f..34d19b1984a 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -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));