linux-kernel - Re: [PATCH 2/2] usb: dwc3: st: add missing depopulate in probe error path

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Message-ID: <20240814231951.k3ejoyno2ogcvsee@synopsys.com>
Date: Wed, 14 Aug 2024 23:19:56 +0000
From: Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
CC: Patrice Chotard <patrice.chotard@...s.st.com>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...com>, Peter Griffin <peter.griffin@...aro.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Lee Jones <lee@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [PATCH 2/2] usb: dwc3: st: add missing depopulate in probe error
 path

On Wed, Aug 14, 2024, Krzysztof Kozlowski wrote:
> Depopulate device in probe error paths to fix leak of children
> resources.
> 
> Fixes: f83fca0707c6 ("usb: dwc3: add ST dwc3 glue layer to manage dwc3 HC")
> Cc: <stable@...r.kernel.org>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---
> 
> Context of my other cleanup patches (separate series to be sent soon)
> will depend on this.
> ---
>  drivers/usb/dwc3/dwc3-st.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-st.c b/drivers/usb/dwc3/dwc3-st.c
> index a9cb04043f08..c8c7cd0c1796 100644
> --- a/drivers/usb/dwc3/dwc3-st.c
> +++ b/drivers/usb/dwc3/dwc3-st.c
> @@ -266,7 +266,7 @@ static int st_dwc3_probe(struct platform_device *pdev)
>  	if (!child_pdev) {
>  		dev_err(dev, "failed to find dwc3 core device\n");
>  		ret = -ENODEV;
> -		goto err_node_put;
> +		goto depopulate;
>  	}
>  
>  	dwc3_data->dr_mode = usb_get_dr_mode(&child_pdev->dev);
> @@ -282,6 +282,7 @@ static int st_dwc3_probe(struct platform_device *pdev)
>  	ret = st_dwc3_drd_init(dwc3_data);
>  	if (ret) {
>  		dev_err(dev, "drd initialisation failed\n");
> +		of_platform_depopulate(dev);
>  		goto undo_softreset;
>  	}
>  
> @@ -291,6 +292,8 @@ static int st_dwc3_probe(struct platform_device *pdev)
>  	platform_set_drvdata(pdev, dwc3_data);
>  	return 0;
>  
> +depopulate:
> +	of_platform_depopulate(dev);
>  err_node_put:
>  	of_node_put(child);
>  undo_softreset:
> -- 
> 2.43.0
> 

Acked-by: Thinh Nguyen <Thinh.Nguyen@...opsys.com>

Thanks,
Thinh