2009/1/21 Greg KH <greg@xxxxxxxxx>: > On Tue, Jan 20, 2009 at 11:50:07PM +0300, Michael Tokarev wrote: >> Is there a way to stop a module from claiming a >> given device no matter how/when it gets plugged? >> >> For example, there's a series of power supplies >> (UPSes) with USB connection (common nowadays) >> which, by default, gets claimed by usbhid module. >> But it does not work as a HID device, instead it >> uses a serial line logic and has a USB<=>serial >> converter inside, which works just fine with >> cypress_m8 usbserial driver. >> >> usbhid module is loaded on startup (to handle >> usb keyboards/mouses), and it claims this device >> too. Using /sys/bus/.../drivers/usbhid/unbind >> releases it, after which cypress_m8 works as >> expected. But after re-plugging it gets claimed >> by usbhid again. > > 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? Thanks! > >> I understand that it's easy to write an udev rule >> (I don't use udev but that's another story) to >> unbind the device from the driver and bind it to >> another driver automatically. That's basically >> what I have for now (handling hidraw* device). >> But that seems somewhat... ugly, at best. >> >> The question is: is it possible to tell usbhid >> to STOP claiming devices with given vendor:device >> identifier, from now on? >> >> I also understand that to do it permanently the >> given vendor:device has to be blacklisted in the >> driver source. But I don't think it's worth the >> effort. > > Why wouldn't it be worth the effort? It's obviously a problem. > > thanks, > > greg k-h > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- Lei Ming -- 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
