Re: [PATCH] usb: dwc3: qcom: Fix memory leak in dwc3_qcom_interconnect_init

[Thinh Nguyen <Thinh.Nguyen@synopsys.com>]

On Tue, Dec 06, 2022, Miaoqian Lin wrote:
> of_icc_get() alloc resources for path handle, we should release it when not
> need anymore. Like the release in dwc3_qcom_interconnect_exit() function.
> Add icc_put() in error handling to fix this.
> 
> Fixes: bea46b981515 ("usb: dwc3: qcom: Add interconnect support in dwc3 driver")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
> ---
>  drivers/usb/dwc3/dwc3-qcom.c | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
> index 7c40f3ffc054..b0a0351d2d8b 100644
> --- a/drivers/usb/dwc3/dwc3-qcom.c
> +++ b/drivers/usb/dwc3/dwc3-qcom.c
> @@ -261,7 +261,8 @@ static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom)
>  	if (IS_ERR(qcom->icc_path_apps)) {
>  		dev_err(dev, "failed to get apps-usb path: %ld\n",
>  				PTR_ERR(qcom->icc_path_apps));
> -		return PTR_ERR(qcom->icc_path_apps);
> +		ret = PTR_ERR(qcom->icc_path_apps);
> +		goto put_path_ddr;
>  	}
>  
>  	max_speed = usb_get_maximum_speed(&qcom->dwc3->dev);
> @@ -274,16 +275,22 @@ static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom)
>  	}
>  	if (ret) {
>  		dev_err(dev, "failed to set bandwidth for usb-ddr path: %d\n", ret);
> -		return ret;
> +		goto put_path_apps;
>  	}
>  
>  	ret = icc_set_bw(qcom->icc_path_apps, APPS_USB_AVG_BW, APPS_USB_PEAK_BW);
>  	if (ret) {
>  		dev_err(dev, "failed to set bandwidth for apps-usb path: %d\n", ret);
> -		return ret;
> +		goto put_path_apps;
>  	}
>  
>  	return 0;
> +
> +put_path_apps:
> +	icc_put(qcom->icc_path_apps);
> +put_path_ddr:
> +	icc_put(qcom->icc_path_ddr);
> +	return ret;
>  }
>  
>  /**
> -- 
> 2.25.1
> 

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

This should go on stable also.

Thanks,
Thinh