linux-kernel - Re: [PATCH] cpufreq: Fix policy->freq_table is NULL in __cpufreq_driver

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Message-ID: <20230403041128.jrsvbm4ddxdyhddg@vireshk-i7>
Date:   Mon, 3 Apr 2023 09:41:28 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Yajun Deng <yajun.deng@...ux.dev>
Cc:     rafael@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpufreq: Fix policy->freq_table is NULL in
 __cpufreq_driver_target()

On 29-03-23, 21:36, Yajun Deng wrote:
> __resolve_freq() may be return target_freq if policy->freq_table is
> NULL. In this case, it should return -EINVAL before __target_index().
> 
> Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
> ---
>  drivers/cpufreq/cpufreq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index c0e5be0fe2d6..308a3df1a940 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -2299,7 +2299,7 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
>  		return cpufreq_driver->target(policy, target_freq, relation);
>  	}
>  
> -	if (!cpufreq_driver->target_index)
> +	if (!cpufreq_driver->target_index || !policy->freq_table)
>  		return -EINVAL;

Hi,

I have sent an alternate patch [1] for this, please try it.

-- 
viresh

[1] https://lore.kernel.org/all/53d4ed4e5b18a59a48790434f8146fb207e11c49.1680494945.git.viresh.kumar@linaro.org/