linux-kernel - [char-misc-next 2/3] mei: set parent for char device

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Message-ID: <20250618095433.3943546-3-alexander.usyskin@intel.com>
Date: Wed, 18 Jun 2025 12:54:32 +0300
From: Alexander Usyskin <alexander.usyskin@...el.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Reuven Abliyev <reuven.abliyev@...el.com>,
	Alexander Usyskin <alexander.usyskin@...el.com>,
	linux-kernel@...r.kernel.org
Subject: [char-misc-next 2/3] mei: set parent for char device

Connect char device to parent device to avoid
parent device unload while char device is
still held open by user-space.

Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
---
 drivers/misc/mei/main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 03898246ab16..c160703d0782 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -1229,6 +1229,7 @@ int mei_register(struct mei_device *dev, struct device *parent)
 	devno = MKDEV(MAJOR(mei_devt), dev->minor);
 	cdev_init(&dev->cdev, &mei_fops);
 	dev->cdev.owner = parent->driver->owner;
+	cdev_set_parent(&dev->cdev, &parent->kobj);
 
 	/* Add the device */
 	ret = cdev_add(&dev->cdev, devno, 1);
-- 
2.43.0