diff options
| author | Perry Yuan <Perry.Yuan@amd.com> | 2022-08-14 19:35:46 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-08-31 22:05:38 +0300 |
| commit | 0e9a86386bca646d3b0fc50e5e15eedb1eb620b3 (patch) | |
| tree | b5b8ec755b2ac2a5eaccacd7f234ca2ce540245a /drivers/cpufreq | |
| parent | b185c5053c65b7704ead4537e4d4d9b33dc398dc (diff) | |
| download | linux-0e9a86386bca646d3b0fc50e5e15eedb1eb620b3.tar.xz | |
cpufreq: amd_pstate: map desired perf into pstate scope for powersave governor
The patch will fix the invalid desired perf value for powersave
governor. This issue is found when testing on one AMD EPYC system, the
actual des_perf is smaller than the min_perf value, that is invalid
value. because the min_perf is the lowest_perf system can support in
idle state.
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/amd-pstate.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index a47a1a2fdd06..fd563a002fd0 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -269,6 +269,7 @@ static void amd_pstate_update(struct amd_cpudata *cpudata, u32 min_perf, u64 prev = READ_ONCE(cpudata->cppc_req_cached); u64 value = prev; + des_perf = clamp_t(unsigned long, des_perf, min_perf, max_perf); value &= ~AMD_CPPC_MIN_PERF(~0L); value |= AMD_CPPC_MIN_PERF(min_perf); @@ -357,8 +358,6 @@ static void amd_pstate_adjust_perf(unsigned int cpu, if (max_perf < min_perf) max_perf = min_perf; - des_perf = clamp_t(unsigned long, des_perf, min_perf, max_perf); - amd_pstate_update(cpudata, min_perf, des_perf, max_perf, true); } |