linux-kernel - Re: [PATCH] ASoC: Intel: Skylake: use dev in dev

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Date:   Fri, 28 Apr 2017 07:38:03 +0900
From:   Takashi Sakamoto <o-takashi@...amocchi.jp>
To:     Colin King <colin.king@...onical.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Vinod Koul <vinod.koul@...el.com>,
        Jeeja KP <jeeja.kp@...el.com>,
        Jayachandran B <jayachandran.b@...el.com>,
        Senthilnathan Veppur <senthilnathanx.veppur@...el.com>,
        Ramesh Babu <ramesh.babu@...el.com>,
        "Subhransu S . Prusty" <subhransu.s.prusty@...el.com>,
        G Kranthi <gudishax.kranthikumar@...el.com>,
        alsa-devel@...a-project.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: Intel: Skylake: use dev in dev_err rather than skl
 pointer

Hi,

On Apr 28 2017 00:13, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The dev_err message is dereferencing an uininitialized skl pointer
> which should be avoided. Don't use skl, use dev instead.
> 
> Detected by CoverityScan, CID#1432042 ("Uninitialized pointer read")
> 
> Fixes: 9fe9c71192832 ("ASoC: Intel: Skylake: Move sst common initialization to a helper function")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  sound/soc/intel/skylake/bxt-sst.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sound/soc/intel/skylake/bxt-sst.c b/sound/soc/intel/skylake/bxt-sst.c
> index fde4bc0f35b0..f5e7dbb1ba39 100644
> --- a/sound/soc/intel/skylake/bxt-sst.c
> +++ b/sound/soc/intel/skylake/bxt-sst.c
> @@ -564,7 +564,7 @@ int bxt_sst_dsp_init(struct device *dev, void __iomem *mmio_base, int irq,
>  
>  	ret = skl_sst_ctx_init(dev, irq, fw_name, dsp_ops, dsp, &skl_dev);
>  	if (ret < 0) {
> -		dev_err(skl->dev, "%s: no device\n", __func__);
> +		dev_err(dev, "%s: no device\n", __func__);
>  		return ret;
>  	}

Thanks for posting this patch, however Vinod already posted the same
fix. Please wait for merging it and verify again:

[alsa-devel] [PATCH 1/3] ASoC: Intel: Skylake: Fix uninitialized pointer
usage
http://mailman.alsa-project.org/pipermail/alsa-devel/2017-April/120214.html


Regards

Takashi Sakamoto