On Wed, Oct 30, 2024 at 09:36:32PM +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. > > Cc: stable@xxxxxxxxxxxxxxx > Fixes: a4422ff22142 (" usb: typec: qcom: Add Qualcomm PMIC Type-C driver") > Signed-off-by: Rex Nie <rex.nie@xxxxxxxxxxxxxxx> Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx> > --- > 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@xxxxxxxxxxxxxxx/ > 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@xxxxxxxxxx/ > --- > 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