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SubjectRe: [PATCH 10/12] cpufreq/amd-pstate: Add missing NULL ptr check in amd_pstate_update
On Wed, Feb 05, 2025 at 11:25:21AM +0000, Dhananjay Ugwekar wrote:
> Check if policy is NULL before dereferencing it in amd_pstate_update.

Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>

--
Thanks and Regards
gautham.


>
> Fixes: e8f555daacd3 ("cpufreq/amd-pstate: fix setting policy current frequency value")
> Signed-off-by: Dhananjay Ugwekar <dhananjay.ugwekar@amd.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
>

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