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cpufreq/amd-pstate: Use sysfs_match_string() for epp

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Rather than scanning the buffer and manually matching the string
use the sysfs macros.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
This commit is contained in:
Mario Limonciello (AMD) 2025-10-09 11:17:51 -05:00
parent e9a6fb0bcd
commit 7e17f48667
1 changed files with 4 additions and 11 deletions
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15
drivers/cpufreq/amd-pstate.c
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@ -118,7 +118,6 @@ static const char * const energy_perf_strings[] = {
[EPP_INDEX_BALANCE_PERFORMANCE] = "balance_performance",
[EPP_INDEX_BALANCE_POWERSAVE] = "balance_power",
[EPP_INDEX_POWERSAVE] = "power",
NULL
};
static unsigned int epp_values[] = {
@ -1137,16 +1136,15 @@ static ssize_t show_amd_pstate_hw_prefcore(struct cpufreq_policy *policy,
static ssize_t show_energy_performance_available_preferences(
struct cpufreq_policy *policy, char *buf)
{
int i = 0;
int offset = 0;
int offset = 0, i;
struct amd_cpudata *cpudata = policy->driver_data;
if (cpudata->policy == CPUFREQ_POLICY_PERFORMANCE)
return sysfs_emit_at(buf, offset, "%s\n",
energy_perf_strings[EPP_INDEX_PERFORMANCE]);
while (energy_perf_strings[i] != NULL)
offset += sysfs_emit_at(buf, offset, "%s ", energy_perf_strings[i++]);
for (i = 0; i < ARRAY_SIZE(energy_perf_strings); i++)
offset += sysfs_emit_at(buf, offset, "%s ", energy_perf_strings[i]);
offset += sysfs_emit_at(buf, offset, "\n");
@ -1157,15 +1155,10 @@ static ssize_t store_energy_performance_preference(
struct cpufreq_policy *policy, const char *buf, size_t count)
{
struct amd_cpudata *cpudata = policy->driver_data;
char str_preference[21];
ssize_t ret;
u8 epp;
ret = sscanf(buf, "%20s", str_preference);
if (ret != 1)
return -EINVAL;
ret = match_string(energy_perf_strings, -1, str_preference);
ret = sysfs_match_string(energy_perf_strings, buf);
if (ret < 0)
return -EINVAL;