From: Tomas Winkler <tomas.winkler@intel.com>
To: gregkh@linuxfoundation.org
Cc: arnd@arndb.de, linux-kernel@vger.kernel.org,
Tomas Winkler <tomas.winkler@intel.com>, <stable@vger.kernel.org>,
Alexander Usyskin <alexander.usyskin@intel.com>
Subject: [char-misc] mei: prevent unloading mei hw modules while the device is opened.
Date: Thu, 18 Jun 2015 11:41:03 +0300 [thread overview]
Message-ID: <1434616863-26800-1-git-send-email-tomas.winkler@intel.com> (raw)
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>
---
drivers/misc/mei/main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 8eb0a9500a90..e9513d651cd3 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -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);
--
2.4.3
reply other threads:[~2015-06-18 8:42 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1434616863-26800-1-git-send-email-tomas.winkler@intel.com \
--to=tomas.winkler@intel.com \
--cc=alexander.usyskin@intel.com \
--cc=arnd@arndb.de \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®