[PATCH] HID: hid-ntrig: fix the error handling code in ntrig_probe

From: Mingxuan Xiang <mx_xiang@hust.edu.cn>
To: Jiri Kosina <jikos@kernel.org>,
	Benjamin Tissoires <benjamin.tissoires@redhat.com>,
	Rafi Rubin <rafi@seas.upenn.edu>
Cc: Mingxuan Xiang <mx_xiang@hust.edu.cn>,
	Dongliang Mu <dzm91@hust.edu.cn>, Jiri Kosina <jkosina@suse.cz>,
	linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] HID: hid-ntrig: fix the error handling code in ntrig_probe
Date: Sun, 13 Mar 2022 23:02:37 +0800	[thread overview]
Message-ID: <20220313150237.1214062-1-mx_xiang@hust.edu.cn> (raw)

If sysfs_create_group in ntrig_probe fails, sysfs_remove_group in
ntrig_remove would hit WARN().

Fix this by returning err in ntrig_probe rather than ignoring the
failure of sysfs_create_group.

CC: Dongliang Mu <dzm91@hust.edu.cn>
Fixes: eab32f5f6557 ("HID: ntrig: add sysfs access to filter parameters")
Signed-off-by: Mingxuan Xiang <mx_xiang@hust.edu.cn>
---
 drivers/hid/hid-ntrig.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
index b5d26f03fe6b..f49427815d98 100644
--- a/drivers/hid/hid-ntrig.c
+++ b/drivers/hid/hid-ntrig.c
@@ -951,10 +951,14 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
 
 	ret = sysfs_create_group(&hdev->dev.kobj,
 			&ntrig_attribute_group);
-	if (ret)
+	if (ret) {
 		hid_err(hdev, "cannot create sysfs group\n");
+		goto err_sysfs_create;
+	}
 
 	return 0;
+err_sysfs_create:
+	hid_hw_stop(hdev);
 err_free:
 	kfree(nd);
 	return ret;
-- 
2.25.1

