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mei: prevent unloading mei hw modules while the device is opened. 

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.

Cc: <stable@vger.kernel.org> #3.17+
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler 2015-06-18 11:41:03 +03:00 committed by Greg Kroah-Hartman
parent a63444375f
commit 154322f473
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/mei/main.c
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@ -682,7 +682,7 @@ int mei_register(struct mei_device *dev, struct device *parent)
/* 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);