linux-kernel - Re: [PATCH 2/2] usb: typec: qcom-pmic: fix pdphy start() error handling

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Message-ID: <ZiZH69N6xou4UXhR@kuha.fi.intel.com>
Date: Mon, 22 Apr 2024 14:20:11 +0300
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Johan Hovold <johan+linaro@...nel.org>
Cc: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
	linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] usb: typec: qcom-pmic: fix pdphy start() error
 handling

On Thu, Apr 18, 2024 at 04:57:30PM +0200, Johan Hovold wrote:
> Move disabling of the vdd-pdphy supply to the start() function which
> enabled it for symmetry and to make sure that it is disabled as intended
> in all error paths of pmic_typec_pdphy_reset() (i.e. not just when
> qcom_pmic_typec_pdphy_enable() fails).
> 
> Fixes: a4422ff22142 ("usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
>  drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c
> index 6560f4fc98d5..5b7f52b74a40 100644
> --- a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c
> +++ b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c
> @@ -475,10 +475,8 @@ static int qcom_pmic_typec_pdphy_enable(struct pmic_typec_pdphy *pmic_typec_pdph
>  
>  	qcom_pmic_typec_pdphy_reset_off(pmic_typec_pdphy);
>  done:
> -	if (ret) {
> -		regulator_disable(pmic_typec_pdphy->vdd_pdphy);
> +	if (ret)
>  		dev_err(dev, "pdphy_enable fail %d\n", ret);
> -	}
>  
>  	return ret;
>  }
> @@ -524,12 +522,17 @@ static int qcom_pmic_typec_pdphy_start(struct pmic_typec *tcpm,
>  
>  	ret = pmic_typec_pdphy_reset(pmic_typec_pdphy);
>  	if (ret)
> -		return ret;
> +		goto err_disable_vdd_pdhy;
>  
>  	for (i = 0; i < pmic_typec_pdphy->nr_irqs; i++)
>  		enable_irq(pmic_typec_pdphy->irq_data[i].irq);
>  
>  	return 0;
> +
> +err_disable_vdd_pdhy:
> +	regulator_disable(pmic_typec_pdphy->vdd_pdphy);
> +
> +	return ret;
>  }
>  
>  static void qcom_pmic_typec_pdphy_stop(struct pmic_typec *tcpm)
> -- 
> 2.43.2

-- 
heikki