linux-kernel - Re: [PATCH -next] greybus/audio_helper: Add missing unlock to avoid mismatched lock

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Date:   Mon, 21 Dec 2020 15:49:43 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Zheng Yongjun <zhengyongjun3@...wei.com>
Cc:     johan@...nel.org, elder@...nel.org, gregkh@...uxfoundation.org,
        greybus-dev@...ts.linaro.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] greybus/audio_helper: Add missing unlock to avoid
 mismatched lock

On Mon, Dec 21, 2020 at 09:02:46PM +0800, Zheng Yongjun wrote:
> Fix a missing unlock in the error branch.
> 
> Signed-off-by: Zheng Yongjun <zhengyongjun3@...wei.com>
> ---
>  drivers/staging/greybus/audio_helper.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/staging/greybus/audio_helper.c b/drivers/staging/greybus/audio_helper.c
> index 237531ba60f3..293675dbea10 100644
> --- a/drivers/staging/greybus/audio_helper.c
> +++ b/drivers/staging/greybus/audio_helper.c
> @@ -135,6 +135,7 @@ int gbaudio_dapm_free_controls(struct snd_soc_dapm_context *dapm,
>  		if (!w) {
>  			dev_err(dapm->dev, "%s: widget not found\n",
>  				widget->name);
> +			mutex_unlock(&dapm->card->dapm_mutex);
>  			return -EINVAL;
>  		}
>  		widget++;

This has already been fixed in mainline by your colleague:

	e77b259f67ab ("staging: greybus: audio: Fix possible leak free widgets in gbaudio_dapm_free_controls")

It seems you're all working on reports from your "Hulk Robot" so perhaps
you can try to coordinate that internally.

Johan