linux-kernel - Re: [PATCH] coresight: potential uninitialized variable in probe()

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Date:   Mon, 17 Jun 2019 13:27:19 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Leo Yan <leo.yan@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] coresight: potential uninitialized variable in probe()

On Thu, 13 Jun 2019 at 00:59, Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> The "drvdata->atclk" clock is optional, but if it gets set to an error
> pointer then we're accidentally return an uninitialized variable instead
> of success.
>
> Fixes: 78e6427b4e7b ("coresight: funnel: Support static funnel")
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---
>  drivers/hwtracing/coresight/coresight-funnel.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
> index 5867fcb4503b..fa97cb9ab4f9 100644
> --- a/drivers/hwtracing/coresight/coresight-funnel.c
> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
> @@ -244,6 +244,7 @@ static int funnel_probe(struct device *dev, struct resource *res)
>         }
>
>         pm_runtime_put(dev);
> +       ret = 0;

Applied - thanks.

>
>  out_disable_clk:
>         if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
> --
> 2.20.1
>