linux-kernel - Re: [PATCH] usb: dwc3: qcom: Release the correct resources in dwc3_qcom

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Date:   Thu, 8 Jun 2023 12:09:53 -0500
From:   Andrew Halaney <ahalaney@...hat.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Lee Jones <lee@...nel.org>, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH] usb: dwc3: qcom: Release the correct resources in
 dwc3_qcom_remove()

On Sun, Jun 04, 2023 at 05:04:37PM +0200, Christophe JAILLET wrote:
> In the probe, some resources are allocated with
> dwc3_qcom_of_register_core() or dwc3_qcom_acpi_register_core(). The
> corresponding resources are already coorectly freed in the error handling

nit not worthy of holding this up: s/coorectly/correctly/

> path of the probe, but not in the remove function.
> 
> Fix it.
> 
> Fixes: 2bc02355f8ba ("usb: dwc3: qcom: Add support for booting with ACPI")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Reviewed-by: Andrew Halaney <ahalaney@...hat.com>

Thanks,
Andrew

> ---
>  drivers/usb/dwc3/dwc3-qcom.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
> index aa96c473f839..9c95f1d909ba 100644
> --- a/drivers/usb/dwc3/dwc3-qcom.c
> +++ b/drivers/usb/dwc3/dwc3-qcom.c
> @@ -942,11 +942,15 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
>  static void dwc3_qcom_remove(struct platform_device *pdev)
>  {
>  	struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
> +	struct device_node *np = pdev->dev.of_node;
>  	struct device *dev = &pdev->dev;
>  	int i;
>  
>  	device_remove_software_node(&qcom->dwc3->dev);
> -	of_platform_depopulate(dev);
> +	if (np)
> +		of_platform_depopulate(&pdev->dev);
> +	else
> +		platform_device_put(pdev);
>  
>  	for (i = qcom->num_clocks - 1; i >= 0; i--) {
>  		clk_disable_unprepare(qcom->clks[i]);
> -- 
> 2.34.1
>