On 2015-12-06 12:23 PM, Stuart Henderson wrote:
On 2015/12/06 06:02, Mickael Torres wrote:
Hello,
This is a kernel patch plus a utility called ugenctl I use to allow
selected USB devices to attach as ugen(4) instead of their more specific
driver. My use case is a Microchip "PICkit 2 Microcontroller Programmer"
that attaches as uhid(4), but the command line utility pk2cmd wants a
udev(4) device. There maybe are some other use cases.
If a device is generally pointless with uhid, we can just knock it
out completely in the kernel, see the UQ_BAD_HID mechanism. I think this
applies to your device.
The bigger problem is "dual use" devices; e.g. some want UPS to attach
to upd(4), others want ugen(4) for use with NUT/apcupsd. Your code is
partially useful for these, but because it just changes things at attach,
won't survive a reboot - if it could instead force a device to detach
and reattach to ugen it would help a lot more cases.
One fairly common (I believe) use is with USB printers that attach as ulpt
but CUPS wants as ugen - for these, this is useful as it stands - just
run it
from rc. Do people want their UPS to sometimes be upd and other times be
a ugen? I can see there might be "I want to change this now" cases, but I
suspect the majority could be done once at each boot and be quite useful.
