Re: [linux-usb-devel] [RFC] HID bus design overview.

Greg KH
2007-04-02T07:42:12Z

On Mon, Apr 02, 2007 at 03:07:29PM +0800, Li Yu wrote:
> Dmitry Torokhov wrote:
> >
> > No, please don't do that. As soon as there is a special driver written
> > for a device that device's VID/PID should be added to generic HID
> > blacklist. This way udev will load the proper driver right away and
> > there will not be any flip-flopping of input devices.
> >
> Hi, I do not think that using blacklist in base driver for this purpose
> is good idea. If so, we need modify source when each new HID device
> driver come, that's so ugly. I think the blacklist only should be used
> for those really broken/buggy hardware, not for these normal hardware
> with extended feature.
>
> Er, I also want to know what are drawbacks of "flip-flopping" ?

You have to create some kind of userspace program to disconnect the
device from the hid driver, and bind it to the new driver, for every new
device/driver that comes along.

Yes, you can do this, but the blacklist is simpler and easier.

thanks,

greg k-h