nagai/kernel
3
0
Fork 0
forked from mirrors/linux
Code Pull requests Activity

cpufreq: amd-pstate: Optimize amd_pstate_update_limits()

Browse source 
Don't take and release the mutex when prefcore isn't present and
avoid initialization of variables that will be initially set
in the function.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Reviewed-by: Perry Yuan <perry.yuan@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
This commit is contained in:
Mario Limonciello 2024-08-26 16:13:57 -05:00
parent ad4caad58d
commit 45722e777f
1 changed files with 5 additions and 5 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/cpufreq/amd-pstate.c
View file

@ -810,17 +810,17 @@ static void amd_pstate_update_limits(unsigned int cpu)
cpudata = policy->driver_data; cpudata = policy->driver_data;
mutex_lock(&amd_pstate_driver_lock); if (!amd_pstate_prefcore)
if ((!amd_pstate_prefcore) || (!cpudata->hw_prefcore)) return;
goto free_cpufreq_put;
mutex_lock(&amd_pstate_driver_lock);
ret = amd_get_highest_perf(cpu, &cur_high); ret = amd_get_highest_perf(cpu, &cur_high);
if (ret) if (ret)
goto free_cpufreq_put; goto free_cpufreq_put;
prev_high = READ_ONCE(cpudata->prefcore_ranking); prev_high = READ_ONCE(cpudata->prefcore_ranking);
if (prev_high != cur_high) { highest_perf_changed = (prev_high != cur_high);
highest_perf_changed = true; if (highest_perf_changed) {
WRITE_ONCE(cpudata->prefcore_ranking, cur_high); WRITE_ONCE(cpudata->prefcore_ranking, cur_high);
if (cur_high < CPPC_MAX_PERF) if (cur_high < CPPC_MAX_PERF)