Re: [PATCH] cpufreq: mediatek: Fix NULL pointer dereference in mediatek-cpufreq

[Matthias Brugger <matthias.bgg@gmail.com>]

On 26/04/2022 13:17, Wan Jiabing wrote:
> Fix following coccicheck error:
> drivers/cpufreq/mediatek-cpufreq.c:464:16-23: ERROR: info is NULL but dereferenced.
> 
> Use pr_err instead of dev_err to avoid dereferring a NULL pointer.
> 
> Fixes: f52b16ba9fe4 ("cpufreq: mediatek: Use device print to show logs")
> Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

> ---
>   drivers/cpufreq/mediatek-cpufreq.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c
> index bcabb3726a5b..901042e9a240 100644
> --- a/drivers/cpufreq/mediatek-cpufreq.c
> +++ b/drivers/cpufreq/mediatek-cpufreq.c
> @@ -461,8 +461,8 @@ static int mtk_cpufreq_init(struct cpufreq_policy *policy)
>   
>   	info = mtk_cpu_dvfs_info_lookup(policy->cpu);
>   	if (!info) {
> -		dev_err(info->cpu_dev,
> -			"dvfs info for cpu%d is not initialized.\n", policy->cpu);
> +		pr_err("dvfs info for cpu%d is not initialized.\n",
> +			policy->cpu);
>   		return -EINVAL;
>   	}
>