linux-kernel - Re: [PATCH] cpufreq: tegra194: Fix an error handling path in tegra194_cpufreq

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Date:   Fri, 28 Apr 2023 17:04:34 +0530
From:   Sumit Gupta <sumitg@...dia.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>
CC:     <linux-kernel@...r.kernel.org>, <kernel-janitors@...r.kernel.org>,
        <linux-pm@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        Sumit Gupta <sumitg@...dia.com>
Subject: Re: [PATCH] cpufreq: tegra194: Fix an error handling path in
 tegra194_cpufreq_probe()



On 25/04/23 18:41, Christophe JAILLET wrote:
> External email: Use caution opening links or attachments
> 
> 
> If the probe needs to be deferred, some resources still need to be
> released. So branch to the error handling path instead of returning
> directly.
> 
> Fixes: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Reviewed-by: Sumit Gupta <sumitg@...dia.com>

> ---
> Compile tested-only
> ---
>   drivers/cpufreq/tegra194-cpufreq.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c
> index c8d03346068a..36dad5ea5947 100644
> --- a/drivers/cpufreq/tegra194-cpufreq.c
> +++ b/drivers/cpufreq/tegra194-cpufreq.c
> @@ -686,8 +686,10 @@ static int tegra194_cpufreq_probe(struct platform_device *pdev)
> 
>          /* Check for optional OPPv2 and interconnect paths on CPU0 to enable ICC scaling */
>          cpu_dev = get_cpu_device(0);
> -       if (!cpu_dev)
> -               return -EPROBE_DEFER;
> +       if (!cpu_dev) {
> +               err = -EPROBE_DEFER;
> +               goto err_free_res;
> +       }
> 
>          if (dev_pm_opp_of_get_opp_desc_node(cpu_dev)) {
>                  err = dev_pm_opp_of_find_icc_paths(cpu_dev, NULL);
> --
> 2.34.1
>