Just a friendly reminder.

Cc'ing Mario Limonciello and Gautham Ranjal Shenoy.

On 11/6/24 9:19 PM, Anastasia Belova wrote:

From: Anastasia Belova abelova@astralinux.ru

commit 5493f9714e4cdaf0ee7cec15899a231400cb1a9f upstream.

cpufreq_cpu_get may return NULL. To avoid NULL-dereference check it and return in case of error.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Anastasia Belova abelova@astralinux.ru Reviewed-by: Perry Yuan perry.yuan@amd.com Signed-off-by: Viresh Kumar viresh.kumar@linaro.org

---

drivers/cpufreq/amd-pstate.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 8c16d67b98bf..0fc5495c935a 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -579,9 +579,14 @@ static void amd_pstate_adjust_perf(unsigned int cpu, unsigned long max_perf, min_perf, des_perf, cap_perf, lowest_nonlinear_perf, max_freq; struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);

• struct amd_cpudata *cpudata = policy->driver_data;

• struct amd_cpudata *cpudata; unsigned int target_freq;

• if (!policy)

• return;
  

• cpudata = policy->driver_data;
• if (policy->min != cpudata->min_limit_freq || policy->max != cpudata->max_limit_freq) amd_pstate_update_min_max_limit(policy);