linux-kernel - Re: [PATCH] ASoC: samsung: Fix refcount leak in aries_audio

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Message-ID: <CY4PR04MB056741C407765D41970C8462CBCB9@CY4PR04MB0567.namprd04.prod.outlook.com>
Date:   Thu, 12 May 2022 07:06:50 -0700
From:   Jonathan Bakker <xc-racer2@...e.ca>
To:     Miaoqian Lin <linmq006@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Liam Girdwood <lgirdwood@...il.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: [PATCH] ASoC: samsung: Fix refcount leak in aries_audio_probe

Acked-by: Jonathan Bakker <xc-racer2@...e.ca>

Thanks!
Jonathan

On 2022-05-11 9:38 p.m., Miaoqian Lin wrote:
> of_parse_phandle() returns a node pointer with refcount
> incremented, we should use of_node_put() on it when done.
> If extcon_find_edev_by_node() fails, it doesn't call of_node_put()
> Calling of_node_put() after extcon_find_edev_by_node() to fix this.
> 
> Fixes: 7a3a7671fa6c ("ASoC: samsung: Add driver for Aries boards")
> Signed-off-by: Miaoqian Lin <linmq006@...il.com>
> ---
>  sound/soc/samsung/aries_wm8994.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sound/soc/samsung/aries_wm8994.c b/sound/soc/samsung/aries_wm8994.c
> index 5265e546b124..83acbe57b248 100644
> --- a/sound/soc/samsung/aries_wm8994.c
> +++ b/sound/soc/samsung/aries_wm8994.c
> @@ -585,10 +585,10 @@ static int aries_audio_probe(struct platform_device *pdev)
>  
>  	extcon_np = of_parse_phandle(np, "extcon", 0);
>  	priv->usb_extcon = extcon_find_edev_by_node(extcon_np);
> +	of_node_put(extcon_np);
>  	if (IS_ERR(priv->usb_extcon))
>  		return dev_err_probe(dev, PTR_ERR(priv->usb_extcon),
>  				     "Failed to get extcon device");
> -	of_node_put(extcon_np);
>  
>  	priv->adc = devm_iio_channel_get(dev, "headset-detect");
>  	if (IS_ERR(priv->adc))
>