* 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? > I've often felt that a /proc or /sys interface to allow blacklist additions or quirk addition would be great. Hacking of new devices often runs faster than distro's kernel releases; it will often be very simple to distribute a 1 liner to make some hardware available than tell people to wait until the next major release of their distro. As a point in instance, a couple of years ago I gave up trying to get some quirks added for usb dual and quad joystick adaptors. I got them added for one of them but not the other. It was just too much hard work. I will say for the record that you, Greg, were very helpful, but all told it was a couple of hours to build and test each quirk patch (I didn't get the controllers at the same time), and then knowing that I would either have to maintain my own out-of-distro kernel or wait about 18 months for my distro to get the patch - meant that the work was not solving any immediate problem; so the pay-off in relation to the scarcity of my time meant it just got forgotten. An user-space post-boot uploadable quirk/blacklist would be great and IMHO result in a bigger supply of quirks. Sam -- 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
