cpufreq/amd-pstate: Add missing NULL ptr check in amd_pstate_update

Check if policy is NULL before dereferencing it in amd_pstate_update.

Fixes: e8f555daacd3 ("cpufreq/amd-pstate: fix setting policy current frequency value")
Signed-off-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Link: https://lore.kernel.org/r/20250205112523.201101-11-dhananjay.ugwekar@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 9c939be59042d01761945ae2e24c3d551c48f5d7..6a604f0797d9f16ead385274d9a802326bd4bb9c 100644 (file)
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -551,6 +551,9 @@ static void amd_pstate_update(struct amd_cpudata *cpudata, u8 min_perf,
        struct cpufreq_policy *policy = cpufreq_cpu_get(cpudata->cpu);
        u8 nominal_perf = READ_ONCE(cpudata->nominal_perf);
 
+       if (!policy)
+               return;
+
        des_perf = clamp_t(u8, des_perf, min_perf, max_perf);
 
        policy->cur = perf_to_freq(cpudata, des_perf);