linux-kernel - [PATCH 10/12] cpufreq/amd-pstate: Add missing NULL ptr check in amd_pstate

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Message-ID: <20250205112523.201101-11-dhananjay.ugwekar@amd.com>
Date: Wed, 5 Feb 2025 11:25:21 +0000
From: Dhananjay Ugwekar <dhananjay.ugwekar@....com>
To: <gautham.shenoy@....com>, <mario.limonciello@....com>,
	<rafael@...nel.org>, <viresh.kumar@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>, "Dhananjay
 Ugwekar" <dhananjay.ugwekar@....com>
Subject: [PATCH 10/12] 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@....com>
---
 drivers/cpufreq/amd-pstate.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 9c939be59042..6a604f0797d9 100644
--- 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);
-- 
2.34.1