linux-kernel - Re: [PATCH] usb: dwc3: meson-g12a: add missed regulator

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Date:   Tue, 19 Nov 2019 16:07:52 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Chuhong Yuan <hslester96@...il.com>
Cc:     Felipe Balbi <balbi@...nel.org>,
        Kevin Hilman <khilman@...libre.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] usb: dwc3: meson-g12a: add missed regulator_disable

On 18/11/2019 12:41, Chuhong Yuan wrote:
> The driver forgets to disable the regulator in probe failure and remove.
> Add the missed calls to fix it.
> 
> Signed-off-by: Chuhong Yuan <hslester96@...il.com>

Fixes: f90db10779ad ("usb: dwc3: meson-g12a: Add support for IRQ based OTG switching")

> ---
>  drivers/usb/dwc3/dwc3-meson-g12a.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-meson-g12a.c b/drivers/usb/dwc3/dwc3-meson-g12a.c
> index 8a3ec1a951fe..d9723d1ad8eb 100644
> --- a/drivers/usb/dwc3/dwc3-meson-g12a.c
> +++ b/drivers/usb/dwc3/dwc3-meson-g12a.c
> @@ -458,7 +458,7 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
>  						dwc3_meson_g12a_irq_thread,
>  						IRQF_ONESHOT, pdev->name, priv);
>  		if (ret)
> -			return ret;
> +			goto err_regulator_disable;
>  	}
>  
>  	dwc3_meson_g12a_usb_init(priv);
> @@ -467,7 +467,7 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
>  	for (i = 0 ; i < PHY_COUNT ; ++i) {
>  		ret = phy_init(priv->phys[i]);
>  		if (ret)
> -			return ret;
> +			goto err_regulator_disable;
>  	}
>  
>  	/* Set PHY Power */
> @@ -517,7 +517,9 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
>  err_phys_exit:
>  	for (i = 0 ; i < PHY_COUNT ; ++i)
>  		phy_exit(priv->phys[i]);
> -
> +err_regulator_disable:
> +	if (priv->vbus)
> +		regulator_disable(priv->vbus);
>  	return ret;
>  }
>  
> @@ -536,6 +538,9 @@ static int dwc3_meson_g12a_remove(struct platform_device *pdev)
>  		phy_exit(priv->phys[i]);
>  	}
>  
> +	if (priv->vbus)
> +		regulator_disable(priv->vbus);
> +
>  	pm_runtime_disable(dev);
>  	pm_runtime_put_noidle(dev);
>  	pm_runtime_set_suspended(dev);
> 

Acked-by: Neil Armstrong <narmstrong@...libre.com>