From mboxrd@z Thu Jan  1 00:00:00 1970
From: greg@kroah.com (Greg KH)
Date: Tue, 23 Feb 2016 21:43:56 -0800
Subject: Is there a bug in dgnc.ko?
In-Reply-To: <20160224045742.GA24012@debian>
References: <20160224045742.GA24012@debian>
Message-ID: <20160224054356.GA1138@kroah.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

On Wed, Feb 24, 2016 at 12:57:42PM +0800, Navy Cheng wrote:
> Hi,
> 
> My kernel version is v4.4, and I have built drivers/staging/dgnc/dgnc.ko.
> I change to *dir*/drivers/staging/dgnc and do like this:
> 
>     sudo insmod ./dgnc.ko

Do you have the hardware that this driver controls?

>     sudo lsmod | grep dgnc

Does that show anything?

>     sudo rmmod ./dgnc
>     sudo insmod ./dgnc.ko
> 
> After I re-insmod the dgnc module, my laptop is breakdown.

Then there's a bug to fix in the driver, it must not clean up everything
properly.  Based on a quick read of it, there is lots of things that
need to be fixed in it, that's why it is in staging.  If you are
interested, I would suggest fixing this issue would be a great start.

good luck!

greg k-h