From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tomas Winkler , Alexander Usyskin Subject: [PATCH 4.1 088/123] mei: prevent unloading mei hw modules while the device is opened. Date: Sat, 8 Aug 2015 15:09:26 -0700 Message-Id: <20150808220720.801824118@linuxfoundation.org> In-Reply-To: <20150808220717.771230091@linuxfoundation.org> References: <20150808220717.771230091@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tomas Winkler commit 154322f47376fed6ab1e4b350aa45fffa15a61aa upstream. chrdev_open() increases reference counter on cdev->owner. Instead of assigning the owner to mei subsystem, the owner has to be set to the underlaying HW module (mei_me or mei_txe), so once the device is opened the HW module cannot be unloaded. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -685,7 +685,7 @@ int mei_register(struct mei_device *dev, /* Fill in the data structures */ devno = MKDEV(MAJOR(mei_devt), dev->minor); cdev_init(&dev->cdev, &mei_fops); - dev->cdev.owner = mei_fops.owner; + dev->cdev.owner = parent->driver->owner; /* Add the device */ ret = cdev_add(&dev->cdev, devno, 1);