linux-kernel - [PATCH] HID: vivaldi: fix sysfs attributes leak

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Message-ID: <YhmAAjNeTjiNoLlJ@google.com>
Date:   Fri, 25 Feb 2022 17:18:58 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     Stephen Boyd <swboyd@...omium.org>,
        Sean O'Brien <seobrien@...omium.org>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] HID: vivaldi: fix sysfs attributes leak

The driver creates the top row map sysfs attribute in input_configured()
method; unfortunately we do not have a callback that is executed when HID
interface is unbound, thus we are leaking these sysfs attributes, for
example when device is disconnected.

To fix it let's switch to managed version of adding sysfs attributes which
will ensure that they are destroyed when the driver is unbound.

Fixes: 14c9c014babe ("HID: add vivaldi HID driver")
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---

Compiled only.

 drivers/hid/hid-vivaldi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/hid-vivaldi.c b/drivers/hid/hid-vivaldi.c
index efa6140915f4..42ceb2058a09 100644
--- a/drivers/hid/hid-vivaldi.c
+++ b/drivers/hid/hid-vivaldi.c
@@ -144,7 +144,7 @@ static void vivaldi_feature_mapping(struct hid_device *hdev,
 static int vivaldi_input_configured(struct hid_device *hdev,
 				    struct hid_input *hidinput)
 {
-	return sysfs_create_group(&hdev->dev.kobj, &input_attribute_group);
+	return devm_device_add_group(&hdev->dev, &input_attribute_group);
 }
 
 static const struct hid_device_id vivaldi_table[] = {
-- 
2.35.1.574.g5d30c73bfb-goog


-- 
Dmitry