linux-kernel - [PATCH 5.4 10/20] HID: alps: fix error return code in alps_input

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Date:   Mon, 26 Apr 2021 09:30:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, TOTE Robot <oslab@...nghua.edu.cn>,
        Jia-Ju Bai <baijiaju1990@...il.com>,
        Jiri Kosina <jkosina@...e.cz>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 10/20] HID: alps: fix error return code in alps_input_configured()

From: Jia-Ju Bai <baijiaju1990@...il.com>

[ Upstream commit fa8ba6e5dc0e78e409e503ddcfceef5dd96527f4 ]

When input_register_device() fails, no error return code is assigned.
To fix this bug, ret is assigned with -ENOENT as error return code.

Reported-by: TOTE Robot <oslab@...nghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hid/hid-alps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c
index d33f5abc8f64..2477b2a3f7c3 100644
--- a/drivers/hid/hid-alps.c
+++ b/drivers/hid/hid-alps.c
@@ -762,6 +762,7 @@ static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
 
 		if (input_register_device(data->input2)) {
 			input_free_device(input2);
+			ret = -ENOENT;
 			goto exit;
 		}
 	}
-- 
2.30.2