From deed718125e73b6bf280dcebb80c39108226388c Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Thu, 5 Sep 2024 11:30:05 -0500 Subject: cpufreq: amd-pstate: Optimize amd_pstate_update_limits() 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 Reviewed-by: Perry Yuan Signed-off-by: Mario Limonciello Reviewed-by: Gautham R. Shenoy --- drivers/cpufreq/amd-pstate.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -814,17 +814,17 @@ static void amd_pstate_update_limits(uns cpudata = policy->driver_data; - mutex_lock(&amd_pstate_driver_lock); - if ((!amd_pstate_prefcore) || (!cpudata->hw_prefcore)) - goto free_cpufreq_put; + if (!amd_pstate_prefcore) + return; + mutex_lock(&amd_pstate_driver_lock); ret = amd_get_highest_perf(cpu, &cur_high); if (ret) goto free_cpufreq_put; prev_high = READ_ONCE(cpudata->prefcore_ranking); - if (prev_high != cur_high) { - highest_perf_changed = true; + highest_perf_changed = (prev_high != cur_high); + if (highest_perf_changed) { WRITE_ONCE(cpudata->prefcore_ranking, cur_high); if (cur_high < CPPC_MAX_PERF)