linux-kernel - [PATCH] hid: hid-alps: fix error return code in alps_input

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Message-Id: <20210304131957.7089-1-baijiaju1990@gmail.com>
Date:   Thu,  4 Mar 2021 05:19:57 -0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     jikos@...nel.org, benjamin.tissoires@...hat.com,
        rydberg@...math.org
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] hid: hid-alps: fix error return code in alps_input_configured()

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>
---
 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 3feaece13ade..6b665931147d 100644
--- a/drivers/hid/hid-alps.c
+++ b/drivers/hid/hid-alps.c
@@ -761,6 +761,7 @@ 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;
 		}
 	}
-- 
2.17.1