linux-kernel - Re: [alsa-devel] [PATCH] ASoC: Intel: sof-rt5682: add a check for devm_clk

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Date:   Thu, 17 Oct 2019 08:16:22 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Chuhong Yuan <hslester96@...il.com>
Cc:     Cezary Rojewski <cezary.rojewski@...el.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Jie Yang <yang.jie@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH] ASoC: Intel: sof-rt5682: add a check for
 devm_clk_get



On 10/16/19 9:50 PM, Chuhong Yuan wrote:
> sof_audio_probe misses a check for devm_clk_get and may cause problems.
> Add a check for it to fix the bug.

Indeed this is a miss, we have this test in all machine drivers except 
this one. Thanks for the patch!

Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

> 
> Signed-off-by: Chuhong Yuan <hslester96@...il.com>
> ---
>   sound/soc/intel/boards/sof_rt5682.c | 9 +++++++++
>   1 file changed, 9 insertions(+)
> 
> diff --git a/sound/soc/intel/boards/sof_rt5682.c b/sound/soc/intel/boards/sof_rt5682.c
> index a437567b8cee..6d15c7ff66bf 100644
> --- a/sound/soc/intel/boards/sof_rt5682.c
> +++ b/sound/soc/intel/boards/sof_rt5682.c
> @@ -576,6 +576,15 @@ static int sof_audio_probe(struct platform_device *pdev)
>   	/* need to get main clock from pmc */
>   	if (sof_rt5682_quirk & SOF_RT5682_MCLK_BYTCHT_EN) {
>   		ctx->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
> +		if (IS_ERR(ctx->mclk)) {
> +			ret = PTR_ERR(ctx->mclk);
> +
> +			dev_err(&pdev->dev,
> +				"Failed to get MCLK from pmc_plt_clk_3: %d\n",
> +				ret);
> +			return ret;
> +		}
> +
>   		ret = clk_prepare_enable(ctx->mclk);
>   		if (ret < 0) {
>   			dev_err(&pdev->dev,
>