cpufreq/amd-pstate: Pass the policy to amd_pstate_update()

All callers of amd_pstate_update() already have a reference to the
cpufreq_policy object.

Pass the entire policy object and grab the cpudata using
"policy->driver_data" instead of passing the cpudata and unnecessarily
grabbing another read-side reference to the cpufreq policy object when
it is already available in the caller.

No functional changes intended.

Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: K Prateek Nayak <kprateek.nayak@amd.com>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Link: https://lore.kernel.org/r/20260316081849.19368-2-kprateek.nayak@amd.com
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>

Author: kudureranganath

drivers/cpufreq/amd-pstate.c

@@ -643,15 +643,12 @@ static inline bool amd_pstate_sample(struct amd_cpudata *cpudata)
 	return true;
 }
 
-static void amd_pstate_update(struct amd_cpudata *cpudata, u8 min_perf,
+static void amd_pstate_update(struct cpufreq_policy *policy, u8 min_perf,
 			      u8 des_perf, u8 max_perf, bool fast_switch, int gov_flags)
 {
-	struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(cpudata->cpu);
+	struct amd_cpudata *cpudata = policy->driver_data;
 	union perf_cached perf = READ_ONCE(cpudata->perf);
 
-	if (!policy)
-		return;
-
 	/* limit the max perf when core performance boost feature is disabled */
 	if (!cpudata->boost_supported)
 		max_perf = min_t(u8, perf.nominal_perf, max_perf);
@@ -766,7 +763,7 @@ static int amd_pstate_update_freq(struct cpufreq_policy *policy,
 	if (!fast_switch)
 		cpufreq_freq_transition_begin(policy, &freqs);
 
-	amd_pstate_update(cpudata, perf.min_limit_perf, des_perf,
+	amd_pstate_update(policy, perf.min_limit_perf, des_perf,
 			  perf.max_limit_perf, fast_switch,
 			  policy->governor->flags);
 
@@ -828,7 +825,7 @@ static void amd_pstate_adjust_perf(unsigned int cpu,
 	if (max_perf < min_perf)
 		max_perf = min_perf;
 
-	amd_pstate_update(cpudata, min_perf, des_perf, max_perf, true,
+	amd_pstate_update(policy, min_perf, des_perf, max_perf, true,
 			policy->governor->flags);
 }