1. Patchew
  2. linux
  3. View series

[PATCH v3] usb: typec: qcom-pmic: init value of hdr_len/txbuf_len earlier

Rex Nie posted 1 patch 3 weeks, 4 days ago
There is a newer version of this series
drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
[PATCH v3] usb: typec: qcom-pmic: init value of hdr_len/txbuf_len earlier
Posted by Rex Nie 3 weeks, 4 days ago 
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.

---
V2 -> V3:
- add changelog, add Fixes tag, add Cc stable ml. Thanks heikki
- Link to v2: https://lore.kernel.org/all/20241030022753.2045-1-rex.nie@jaguarmicro.com/
V1 -> V2:
- keep printout when data didn't transmit, thanks Bjorn, bod, greg k-h
- Links: https://lore.kernel.org/all/b177e736-e640-47ed-9f1e-ee65971dfc9c@linaro.org/

Cc: stable@vger.kernel.org
Fixes: a4422ff22142 (" usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
Signed-off-by: Rex Nie <rex.nie@jaguarmicro.com>
---
 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
Re: [PATCH v3] usb: typec: qcom-pmic: init value of hdr_len/txbuf_len earlier
Posted by Heikki Krogerus 3 weeks, 4 days ago 
On Wed, Oct 30, 2024 at 06:32:57PM +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.
> 
> ---
> V2 -> V3:
> - add changelog, add Fixes tag, add Cc stable ml. Thanks heikki
> - Link to v2: https://lore.kernel.org/all/20241030022753.2045-1-rex.nie@jaguarmicro.com/
> V1 -> V2:
> - keep printout when data didn't transmit, thanks Bjorn, bod, greg k-h
> - Links: https://lore.kernel.org/all/b177e736-e640-47ed-9f1e-ee65971dfc9c@linaro.org/
> 
> Cc: stable@vger.kernel.org
> Fixes: a4422ff22142 (" usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
> Signed-off-by: Rex Nie <rex.nie@jaguarmicro.com>

Sorry, but this is still broken.

Those tags need to come before the "---". Otherwise they will not
end-up into the actual commit when this patch is applied.

It should look something like this:

        usb: typec: qcom-pmic: init value of hdr_len/txbuf_len earlier

        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.

        Cc: stable@vger.kernel.org
        Fixes: a4422ff22142 (" usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
        Signed-off-by: Rex Nie <rex.nie@jaguarmicro.com>
        ---
        V2 -> V3:
        - add changelog, add Fixes tag, add Cc stable ml. Thanks heikki
        - Link to v2: https://lore.kernel.org/all/20241030022753.2045-1-rex.nie@jaguarmicro.com/
        V1 -> V2:
        - keep printout when data didn't transmit, thanks Bjorn, bod, greg k-h
        - Links: https://lore.kernel.org/all/b177e736-e640-47ed-9f1e-ee65971dfc9c@linaro.org/

         drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_pdphy.c | 8 ++++----
         1 file changed, 4 insertions(+), 4 deletions(-)

        diff --git a/drivers/usb/typec...

thanks,

-- 
heikki
Re: [PATCH v3] usb: typec: qcom-pmic: init value of hdr_len/txbuf_len earlier
Posted by Bryan O'Donoghue 3 weeks, 4 days ago 
On 30/10/2024 10:32, 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.
> 
> ---
> V2 -> V3:
> - add changelog, add Fixes tag, add Cc stable ml. Thanks heikki
> - Link to v2: https://lore.kernel.org/all/20241030022753.2045-1-rex.nie@jaguarmicro.com/
> V1 -> V2:
> - keep printout when data didn't transmit, thanks Bjorn, bod, greg k-h
> - Links: https://lore.kernel.org/all/b177e736-e640-47ed-9f1e-ee65971dfc9c@linaro.org/
> 
> Cc: stable@vger.kernel.org
> Fixes: a4422ff22142 (" usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
> Signed-off-by: Rex Nie <rex.nie@jaguarmicro.com>
> ---
>   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,
Acked-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>

Patchew 2.1-devel-b67e4c2

© 2016 - 2024 Red Hat, Inc.