Is there a bug in dgnc.ko?

[greg@kroah.com (Greg KH)]

On Wed, Feb 24, 2016 at 07:57:01PM +0800, Navy Cheng wrote:
> On Tue, Feb 23, 2016 at 09:43:56PM -0800, Greg KH wrote:
> > 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?
> 
> I'm not sure. My laptop is Dell Inspiron 14R - 5437 and I don't know if
> there is the right hardware. I often don't know about what a driver is used
> for in drivers/staging/. Is there any good way to know the function of a
> driver or module?

If you don't think you have the hardware, then almost always, you don't
have the hardware, it's pretty simple :)

> > 
> > >     sudo lsmod | grep dgnc
> > 
> > Does that show anything?
> 
> Output: dgnc                   65536  0

Great, it loaded, then crashes when you unload, congratulations, you can
now work on fixing that bug!

good luck,

greg k-h