On Fri, 11 Jun 2010, Amit Nagal wrote: > HI Alen , > > Thanx for the reply . it will certainly help my cause . > > But my problem is , before a userspace program send the command > > echo N >/sys/bus/usb/devices/.../bConfigurationValue to the device , > > usb host will already select default mass storage configuration on > device plugin > > (device exposes default 1st configuration as mass storage and we have > no control over device firmware ). Yes. Is this a problem? Won't the device work okay if the host starts out by selecting the mass-storage config and then switches to the other config later? > this is not desired . what i want is , usb host on detecting this > multi configuration device , > > instead of selecting default configuration , invoke some userspace binary > > where depending upon "echo N > >/sys/bus/usb/devices/.../bConfigurationValue to the device " > > desired configuration can be selected . > > so how i can handle this signalling from usb host to userspace . > thanx for reply once again Right now there is no way to prevent the core from installing the mass-storage config automatically. If necessary we could add a quirk to prevent this. But are you certain that you really need it? Alan Stern -- 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
