linux-kernel - [PATCH AUTOSEL 5.4 4/8] HID: wacom: Add error check to wacom_parse_and

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Message-Id: <20230615113938.649627-4-sashal@kernel.org>
Date:   Thu, 15 Jun 2023 07:39:34 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Denis Arefev <arefev@...mel.ru>, Ping Cheng <ping.cheng@...om.com>,
        Jiri Kosina <jkosina@...e.cz>, Sasha Levin <sashal@...nel.org>,
        jason.gerecke@...om.com, jikos@...nel.org,
        benjamin.tissoires@...hat.com, linux-input@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 4/8] HID: wacom: Add error check to wacom_parse_and_register()

From: Denis Arefev <arefev@...mel.ru>

[ Upstream commit 16a9c24f24fbe4564284eb575b18cc20586b9270 ]

   Added a variable check and
   transition in case of an error

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Denis Arefev <arefev@...mel.ru>
Reviewed-by: Ping Cheng <ping.cheng@...om.com>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hid/wacom_sys.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index a93070f5b214c..36cb456709ed7 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -2419,8 +2419,13 @@ static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
 		goto fail_quirks;
 	}
 
-	if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
+	if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR) {
 		error = hid_hw_open(hdev);
+		if (error) {
+			hid_err(hdev, "hw open failed\n");
+			goto fail_quirks;
+		}
+	}
 
 	wacom_set_shared_values(wacom_wac);
 	devres_close_group(&hdev->dev, wacom);
-- 
2.39.2