linux-kernel - [PATCH] HID: wacom: Make use of the helper function devm_add_action_or

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Date:   Wed, 22 Sep 2021 20:59:39 +0800
From:   Cai Huoqing <caihuoqing@...du.com>
To:     <caihuoqing@...du.com>
CC:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] HID: wacom: Make use of the helper function devm_add_action_or_reset()

The helper function devm_add_action_or_reset() will internally
call devm_add_action(), and if devm_add_action() fails then it will
execute the action mentioned and return the error code. So
use devm_add_action_or_reset() instead of devm_add_action()
to simplify the error handling, reduce the code.

Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
---
 drivers/hid/wacom_sys.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index 93f49b766376..3aed7ba249f7 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -892,10 +892,9 @@ static int wacom_add_shared_data(struct hid_device *hdev)
 
 	wacom_wac->shared = &data->shared;
 
-	retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
+	retval = devm_add_action_or_reset(&hdev->dev, wacom_remove_shared_data, wacom);
 	if (retval) {
 		mutex_unlock(&wacom_udev_list_lock);
-		wacom_remove_shared_data(wacom);
 		return retval;
 	}
 
-- 
2.25.1