This is a note to let you know that I've just added the patch titled
mei: prevent unloading mei hw modules while the device is opened.
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mei-prevent-unloading-mei-hw-modules-while-the-device-is-opened.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 154322f47376fed6ab1e4b350aa45fffa15a61aa Mon Sep 17 00:00:00 2001
From: Tomas Winkler <[email protected]>
Date: Thu, 18 Jun 2015 11:41:03 +0300
Subject: mei: prevent unloading mei hw modules while the device is opened.
From: Tomas Winkler <[email protected]>
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 <[email protected]>
Signed-off-by: Alexander Usyskin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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);
Patches currently in stable-queue which might be from [email protected]
are
queue-4.1/mei-prevent-unloading-mei-hw-modules-while-the-device-is-opened.patch
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