Subject: Re: [PATCH] phy: tegra: add missing put_device() call in
 tegra210_xusb_padctl_probe()
To:     Qing Wang <wangqing@vivo.com>, JC Kuo <jckuo@nvidia.com>,
        Kishon Vijay Abraham I <kishon@ti.com>,
        Vinod Koul <vkoul@kernel.org>,
        Thierry Reding <thierry.reding@gmail.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        linux-phy@lists.infradead.org, linux-tegra@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <1638881776-3308-1-git-send-email-wangqing@vivo.com>
From:   Dmitry Osipenko <digetx@gmail.com>
Message-ID: <b56a0b92-cf64-570c-08f8-e7a54fc55946@gmail.com>
Date:   Tue, 7 Dec 2021 17:35:02 +0300
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07.12.2021 15:56, Qing Wang пишет:
> From: Wang Qing <wangqing@vivo.com>
> 
> of_find_device_by_node() takes a reference to the embedded struct device 
> which needs to be dropped when error return.
> 
> Signed-off-by: Wang Qing <wangqing@vivo.com>
> ---
>  drivers/phy/tegra/xusb-tegra210.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/phy/tegra/xusb-tegra210.c b/drivers/phy/tegra/xusb-tegra210.c
> index eedfc7c..05a0800
> --- a/drivers/phy/tegra/xusb-tegra210.c
> +++ b/drivers/phy/tegra/xusb-tegra210.c
> @@ -3170,8 +3170,10 @@ tegra210_xusb_padctl_probe(struct device *dev,
>  		goto out;
>  	}
>  
> -	if (!platform_get_drvdata(pdev))
> +	if (!platform_get_drvdata(pdev)) {
> +		put_device(&pdev->dev);
>  		return ERR_PTR(-EPROBE_DEFER);
> +	}
>  
>  	padctl->regmap = dev_get_regmap(&pdev->dev, "usb_sleepwalk");
>  	if (!padctl->regmap)
> 

What if dev_get_regmap() fails? What if driver is removed?

Please either fix it properly or don't fix it.