linux-kernel - Re: [PATCH v2] usb: typec: qcom-pmic: init value of hdr_len/txbuf

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Message-ID: <ZyHwscXdDl-ui7CK@kuha.fi.intel.com>
Date: Wed, 30 Oct 2024 10:39:13 +0200
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Rex Nie <rex.nie@...uarmicro.com>
Cc: bryan.odonoghue@...aro.org, gregkh@...uxfoundation.org,
	linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, angus.chen@...uarmicro.com
Subject: Re: [PATCH v2] usb: typec: qcom-pmic: init value of
 hdr_len/txbuf_len earlier

Hi,

On Wed, Oct 30, 2024 at 10:27:54AM +0800, Rex Nie wrote:
> If the read of USB_PDPHY_RX_ACKNOWLEDGE_REG failed, then hdr_len and
> txbuf_len are uninitialized. This commit stops to print uninitialized
> value and misleading/false data.
> 
> Signed-off-by: Rex Nie <rex.nie@...uarmicro.com>
> ---

You need to include a changelog also for the patch itself here, after
that "---" separator. This patch is also still missing the Fixes tag.

You can read more about how to send the patches from the documentation:
https://www.kernel.org/doc/html/latest/process/submitting-patches.html

So please send v3 with those fixed. Don't forget to Cc the stable ml.:
https://www.kernel.org/doc/html/latest/process/submitting-patches.html#select-the-recipients-for-your-patch

thanks,

>  drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c | 8 ++++----
>  1 file changed, 4 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 5b7f52b74a40..726423684bae 100644
> --- a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c
> +++ b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c
> @@ -227,6 +227,10 @@ qcom_pmic_typec_pdphy_pd_transmit_payload(struct pmic_typec_pdphy *pmic_typec_pd
>  
>  	spin_lock_irqsave(&pmic_typec_pdphy->lock, flags);
>  
> +	hdr_len = sizeof(msg->header);
> +	txbuf_len = pd_header_cnt_le(msg->header) * 4;
> +	txsize_len = hdr_len + txbuf_len - 1;
> +
>  	ret = regmap_read(pmic_typec_pdphy->regmap,
>  			  pmic_typec_pdphy->base + USB_PDPHY_RX_ACKNOWLEDGE_REG,
>  			  &val);
> @@ -244,10 +248,6 @@ qcom_pmic_typec_pdphy_pd_transmit_payload(struct pmic_typec_pdphy *pmic_typec_pd
>  	if (ret)
>  		goto done;
>  
> -	hdr_len = sizeof(msg->header);
> -	txbuf_len = pd_header_cnt_le(msg->header) * 4;
> -	txsize_len = hdr_len + txbuf_len - 1;
> -
>  	/* Write message header sizeof(u16) to USB_PDPHY_TX_BUFFER_HDR_REG */
>  	ret = regmap_bulk_write(pmic_typec_pdphy->regmap,
>  				pmic_typec_pdphy->base + USB_PDPHY_TX_BUFFER_HDR_REG,
> -- 
> 2.17.1

-- 
heikki