6.13-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mario Limonciello <mario.limonciello@xxxxxxx> [ Upstream commit 6c093d5a5b73ec1caf1e706510ae6031af2f9d43 ] Using scoped guard declaration will unlock mutexes automatically. Reviewed-by: Gautham R. Shenoy <gautham.shenoy@xxxxxxx> Link: https://lore.kernel.org/r/20241209185248.16301-5-mario.limonciello@xxxxxxx Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx> Stable-dep-of: 3ace20038e19 ("cpufreq/amd-pstate: Fix cpufreq_policy ref counting") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/cpufreq/amd-pstate.c | 32 ++++++++++++-------------------- 1 file changed, 12 insertions(+), 20 deletions(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 03a5fd713ad59..bdaa19c25887b 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -727,12 +727,12 @@ static int amd_pstate_set_boost(struct cpufreq_policy *policy, int state) pr_err("Boost mode is not supported by this processor or SBIOS\n"); return -EOPNOTSUPP; } - mutex_lock(&amd_pstate_driver_lock); + guard(mutex)(&amd_pstate_driver_lock); + ret = amd_pstate_cpu_boost_update(policy, state); WRITE_ONCE(cpudata->boost_state, !ret ? state : false); policy->boost_enabled = !ret ? state : false; refresh_frequency_limits(policy); - mutex_unlock(&amd_pstate_driver_lock); return ret; } @@ -823,7 +823,8 @@ static void amd_pstate_update_limits(unsigned int cpu) if (!amd_pstate_prefcore) return; - mutex_lock(&amd_pstate_driver_lock); + guard(mutex)(&amd_pstate_driver_lock); + ret = amd_get_highest_perf(cpu, &cur_high); if (ret) goto free_cpufreq_put; @@ -843,7 +844,6 @@ static void amd_pstate_update_limits(unsigned int cpu) if (!highest_perf_changed) cpufreq_update_policy(cpu); - mutex_unlock(&amd_pstate_driver_lock); } /* @@ -1172,11 +1172,11 @@ static ssize_t store_energy_performance_preference( if (ret < 0) return -EINVAL; - mutex_lock(&amd_pstate_limits_lock); + guard(mutex)(&amd_pstate_limits_lock); + ret = amd_pstate_set_energy_pref_index(cpudata, ret); - mutex_unlock(&amd_pstate_limits_lock); - return ret ?: count; + return ret ? ret : count; } static ssize_t show_energy_performance_preference( @@ -1340,13 +1340,10 @@ EXPORT_SYMBOL_GPL(amd_pstate_update_status); static ssize_t status_show(struct device *dev, struct device_attribute *attr, char *buf) { - ssize_t ret; - mutex_lock(&amd_pstate_driver_lock); - ret = amd_pstate_show_status(buf); - mutex_unlock(&amd_pstate_driver_lock); + guard(mutex)(&amd_pstate_driver_lock); - return ret; + return amd_pstate_show_status(buf); } static ssize_t status_store(struct device *a, struct device_attribute *b, @@ -1355,9 +1352,8 @@ static ssize_t status_store(struct device *a, struct device_attribute *b, char *p = memchr(buf, '\n', count); int ret; - mutex_lock(&amd_pstate_driver_lock); + guard(mutex)(&amd_pstate_driver_lock); ret = amd_pstate_update_status(buf, p ? p - buf : count); - mutex_unlock(&amd_pstate_driver_lock); return ret < 0 ? ret : count; } @@ -1640,13 +1636,11 @@ static int amd_pstate_epp_cpu_offline(struct cpufreq_policy *policy) min_perf = READ_ONCE(cpudata->lowest_perf); - mutex_lock(&amd_pstate_limits_lock); + guard(mutex)(&amd_pstate_limits_lock); amd_pstate_update_perf(cpudata, min_perf, 0, min_perf, false); amd_pstate_set_epp(cpudata, AMD_CPPC_EPP_BALANCE_POWERSAVE); - mutex_unlock(&amd_pstate_limits_lock); - return 0; } @@ -1675,13 +1669,11 @@ static int amd_pstate_epp_resume(struct cpufreq_policy *policy) struct amd_cpudata *cpudata = policy->driver_data; if (cpudata->suspended) { - mutex_lock(&amd_pstate_limits_lock); + guard(mutex)(&amd_pstate_limits_lock); /* enable amd pstate from suspend state*/ amd_pstate_epp_reenable(cpudata); - mutex_unlock(&amd_pstate_limits_lock); - cpudata->suspended = false; } -- 2.39.5
