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

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Date: Fri, 19 Apr 2024 00:41:54 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Johan Hovold <johan+linaro@...nel.org>,
 Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc: 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 18/04/2024 15:57, 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>
> ---
>   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)

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>