On Thu, Jan 22, 2009 at 12:24:20AM +0300, Michael Tokarev wrote: > Greg KH wrote: > > On Wed, Jan 21, 2009 at 05:20:45PM -0000, Sam Liddicott wrote: > >> * Greg KH wrote, On 21/01/09 16:23: > >>> On Wed, Jan 21, 2009 at 11:44:03PM +0800, Ming Lei wrote: > >>> > >>>> 2009/1/21 Greg KH <greg@xxxxxxxxx>: > >>>> > >>>>> Just add a blacklist rule to the usbhid driver for this device. There > >>>>> are a number of devices out there that need this functionality, which is > >>>>> why there is such a list. > >>>>> > >>>> Is it possible to implement a generic blacklist mechanism in driver core > >>>> to support the function for all kinds of drivers? or is it necessary to do that? > >>>> > >>> It's not necessary as the hid core already supports this very thing due > >>> to the need for it (it's the easiest way to write a userspace Windows > >>> driver, so lots of manufacturers lie about their devices in order to > >>> work around having to write a Windows kernel driver.) > >>> > >>> So just add this device to the hid core blacklist, and you are all set. > >>> > >>> Care to send a patch? > > Ok, I'm looking at this now, but have a question: > which quirk code(s)/bits should I use for that? > Assuming the table in question is in > drivers/hid/usbhid/hid-quirks.c > file. > What's needed is to stop usbhid module from claiming this device in the > first place. No, add the device to the hid_ignore_list[] table in drivers/hid/hid-core.c. > >> I've often felt that a /proc or /sys interface to allow blacklist > >> additions or quirk addition would be great. > > > > Some subsystems support this, like the HID subsystem :) > > Oh, I didn't know. In fact, that's exactly what I was asking in my > first email in this thread - to have some module parameter or a sysfs > file which can be touched to stop the module from claiming the device. > This also helps to debug it, to know the right bits to use.. which I > don't know... ;) There is some way to do this, but I can't recall how at the moment. Try asking the HID maintainer about this. good luck, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
