Bjorn, Ok, get it, Thanks. BRs Rex
-----邮件原件----- 发件人: Bjorn Andersson andersson@kernel.org 发送时间: 2024年11月1日 23:45 收件人: Rex Nie rex.nie@jaguarmicro.com 抄送: bryan.odonoghue@linaro.org; heikki.krogerus@linux.intel.com; gregkh@linuxfoundation.org; linux@roeck-us.net; caleb.connolly@linaro.org; linux-arm-msm@vger.kernel.org; linux-usb@vger.kernel.org; linux-kernel@vger.kernel.org; Angus Chen angus.chen@jaguarmicro.com; stable@vger.kernel.org 主题: Re: [PATCH v4] usb: typec: qcom-pmic: init value of hdr_len/txbuf_len earlier
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On Wed, Oct 30, 2024 at 09:36:32PM GMT, 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.
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
Reviewed-by: Bjorn Andersson andersson@kernel.org
Nice job. Next time, please don't use In-Reply-To between patch versions.
Regards, Bjorn
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@linar o.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/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) toUSB_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