linux-kernel - [PATCH] usb: typec: ucsi: huawei

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Message-ID: <20250415172006.126740-1-mitltlatltl@gmail.com>
Date: Wed, 16 Apr 2025 01:20:05 +0800
From: Pengyu Luo <mitltlatltl@...il.com>
To: Pengyu Luo <mitltlatltl@...il.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Dan Carpenter <dan.carpenter@...aro.org>,
	linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] usb: typec: ucsi: huawei_gaokun: add error checking

'cci' may be uninitialized, adding error checking to fix it.

Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
Closes: https://lore.kernel.org/all/Z_44zoTyLLdXNkKT@stanley.mountain
Fixes: 00327d7f2c8c ("usb: typec: ucsi: add Huawei Matebook E Go ucsi driver")
Signed-off-by: Pengyu Luo <mitltlatltl@...il.com>
---
 drivers/usb/typec/ucsi/ucsi_huawei_gaokun.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/ucsi/ucsi_huawei_gaokun.c b/drivers/usb/typec/ucsi/ucsi_huawei_gaokun.c
index 344aa7aeaf..7b5222081b 100644
--- a/drivers/usb/typec/ucsi/ucsi_huawei_gaokun.c
+++ b/drivers/usb/typec/ucsi/ucsi_huawei_gaokun.c
@@ -359,6 +359,7 @@ static int gaokun_ucsi_notify(struct notifier_block *nb,
 			      unsigned long action, void *data)
 {
 	u32 cci;
+	int ret;
 	struct gaokun_ucsi *uec = container_of(nb, struct gaokun_ucsi, nb);
 
 	switch (action) {
@@ -368,7 +369,10 @@ static int gaokun_ucsi_notify(struct notifier_block *nb,
 		return NOTIFY_OK;
 
 	case EC_EVENT_UCSI:
-		gaokun_ucsi_read_cci(uec->ucsi, &cci);
+		ret = gaokun_ucsi_read_cci(uec->ucsi, &cci);
+		if (ret)
+			return NOTIFY_DONE;
+
 		ucsi_notify_common(uec->ucsi, cci);
 		if (UCSI_CCI_CONNECTOR(cci))
 			gaokun_ucsi_handle_no_usb_event(uec, UCSI_CCI_CONNECTOR(cci) - 1);
-- 
2.49.0