| Message ID | 20240217213010.2466-1-dsmythies@telus.net |
|---|---|
| State | Accepted |
| Commit | f0a0fc10abb062d122db5ac4ed42f6d1ca342649 |
| Headers | show |
| Series | cpufreq: intel_pstate: fix pstate limits enforcement for adjust_perf call back | expand |
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index ca94e60e705a..79619227ea51 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -2987,6 +2987,9 @@ static void intel_cpufreq_adjust_perf(unsigned int cpunum, if (min_pstate < cpu->min_perf_ratio) min_pstate = cpu->min_perf_ratio; + if (min_pstate > cpu->max_perf_ratio) + min_pstate = cpu->max_perf_ratio; + max_pstate = min(cap_pstate, cpu->max_perf_ratio); if (max_pstate < min_pstate) max_pstate = min_pstate;
There is a loophole in pstate limit clamping for the intel_cpufreq CPU frequency scaling driver (intel_pstate in passive mode), schedutil CPU frequency scaling governor, HWP (HardWare Pstate) control enabled, when the adjust_perf call back path is used. Fix it. Signed-off-by: Doug Smythies <dsmythies@telus.net> --- drivers/cpufreq/intel_pstate.c | 3 +++ 1 file changed, 3 insertions(+)