On Thu, Jan 19, 2006 at 10:35:37AM +0530, Mukund JB. wrote:
>
>
> > -----Original Message-----
> > From: Greg KH [mailto:[email protected]]
> > Sent: Thursday, January 19, 2006 10:33 AM
> > To: Mukund JB.
> > Cc: [email protected]
> > Subject: Re: clarity on kref needed.
> >
> >
> > On Thu, Jan 19, 2006 at 10:15:51AM +0530, Mukund JB. wrote:
> > >
> > > > > I have gone through kref and am planning to implement then
> > > > in my usb driver.
> > > >
> > > > What kind of usb driver?
> > > It is a finger print authentication USB driver. it doesn ot do the
> > > authgentication but transports data to the application which really
> > > does some processing.
> >
> > You shouldn't need a kernel driver for this, it can be done
> > in userspace
> > with libusb/usbfs, right?
>
> I mean I will register a char driver. I will just write a simple char
> kernel module to read data from the USB device and zero copy it to the
> userspace application. I guess that is the minimum work we need to do.
You can do that from userspace with libusb/usbfs with no kernel driver
needed. Why not do that instead?
> Is there any other way using libusb/usbfs in which we can do this
> without a need of USB kernel driver?
Yes, use libusb/usbfs :)
> > > No, I did not find any Documentation/kref.txt.
> > > But I have read about kred in the link below:
> > >
> > http://developer.osdl.org/dev/robustmutexes/src/fusyn.hg/Docum
> entation/kref.txt
> > >
> > >Is kref depricated because I find nothing related to it in linux/Documentation/?
>
> > What kernel version are you looking at? Look in the kernel source tree
> > from kernel.org. What kernel tree are you building your driver against.
>
> I am planning it for 2.6.11.12.
That's a pretty old kernel version, why not use the latest version?
thanks,
greg k-h
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