linux-kernel - Re: [PATCH] sound: fsl: add missing put_device() call in imx_hdmi

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Date:   Wed, 8 Dec 2021 14:05:05 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Qing Wang <wangqing@...o.com>
Cc:     Nicolin Chen <nicoleotsuka@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Shengjiu Wang <shengjiu.wang@...il.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        alsa-devel@...a-project.org, linuxppc-dev@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sound: fsl: add missing put_device() call in
 imx_hdmi_probe()

On Tue, Dec 07, 2021 at 04:56:58AM -0800, Qing Wang wrote:
> From: Wang Qing <wangqing@...o.com>
> 
> of_find_device_by_node() takes a reference to the embedded struct device 
> which needs to be dropped when error return.

...

>  	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
>  	if (!data) {
> +		put_device(&cpu_pdev->dev);

If it's of_find_device_by_node() you need an of_node_put() since you're
dropping a reference on the OF node.

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