linux-kernel - [PATCH v2 1/2] usb: typec: ucsi: glink: fix off-by-one in connector

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Message-Id: <20241109-ucsi-glue-fixes-v2-1-8b21ff4f9fbe@linaro.org>
Date: Sat, 09 Nov 2024 02:04:14 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Heikki Krogerus <heikki.krogeurs@...ux.intel.com>, 
 linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, Abel Vesa <abel.vesa@...aro.org>, 
 Johan Hovold <johan+linaro@...nel.org>, stable@...r.kernel.org, 
 Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH v2 1/2] usb: typec: ucsi: glink: fix off-by-one in
 connector_status

UCSI connector's indices start from 1 up to 3, PMIC_GLINK_MAX_PORTS.
Correct the condition in the pmic_glink_ucsi_connector_status()
callback, fixing Type-C orientation reporting for the third USB-C
connector.

Fixes: 76716fd5bf09 ("usb: typec: ucsi: glink: move GPIO reading into connector_status callback")
Cc: stable@...r.kernel.org
Reported-by: Abel Vesa <abel.vesa@...aro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
Reviewed-by: Johan Hovold <johan+linaro@...nel.org>
Tested-by: Johan Hovold <johan+linaro@...nel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/usb/typec/ucsi/ucsi_glink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/typec/ucsi/ucsi_glink.c b/drivers/usb/typec/ucsi/ucsi_glink.c
index 3e4d88ab338e50d4265df15fc960907c36675282..2e12758000a7d2d62f6e0b273cb29eafa631122c 100644
--- a/drivers/usb/typec/ucsi/ucsi_glink.c
+++ b/drivers/usb/typec/ucsi/ucsi_glink.c
@@ -185,7 +185,7 @@ static void pmic_glink_ucsi_connector_status(struct ucsi_connector *con)
 	struct pmic_glink_ucsi *ucsi = ucsi_get_drvdata(con->ucsi);
 	int orientation;
 
-	if (con->num >= PMIC_GLINK_MAX_PORTS ||
+	if (con->num > PMIC_GLINK_MAX_PORTS ||
 	    !ucsi->port_orientation[con->num - 1])
 		return;
 

-- 
2.39.5