Due to some other issue with one devices supported by hid-led I figured out that it's no longer needed to list devices with own driver in hid_have_special_driver[]. So I removed the entries for the hid-led devices and got the following. When I plugged in the device first the device-specific driver wasn't loaded. After unplugging/re-plugging the device-specific driver was loaded properly. It seems usbhid module wasn't fully loaded and active yet when hid-generic checks for a device-specific driver for the first time. This also explains why the second attempt was successful. Did you come across similar races? At a first glance I'm not sure how to prevent this race. Any idea? [ 15.785205] usb 2-5: new low-speed USB device number 4 using xhci_hcd [ 15.917766] usb 2-5: New USB device found, idVendor=0fc5, idProduct=b080, bcdDevice= 0.1f [ 15.917842] usb 2-5: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 15.917899] usb 2-5: Product: USB IO Controller [ 15.917941] usb 2-5: Manufacturer: Delcom Products Inc. [ 15.943667] hid-generic 0003:0FC5:B080.0001: hiddev96,hidraw0: USB HID v1.00 Device [Delcom Products Inc. USB IO Controller ] on usb-0000:00:14.0-5/input0 [ 15.944171] usbcore: registered new interface driver usbhid [ 15.944204] usbhid: USB HID core driver [ 101.496255] usb 2-5: USB disconnect, device number 4 [ 107.364402] usb 2-5: new low-speed USB device number 5 using xhci_hcd [ 107.496582] usb 2-5: New USB device found, idVendor=0fc5, idProduct=b080, bcdDevice= 0.1f [ 107.496659] usb 2-5: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 107.496716] usb 2-5: Product: USB IO Controller [ 107.496757] usb 2-5: Manufacturer: Delcom Products Inc. [ 107.510676] hid-led 0003:0FC5:B080.0002: hidraw0: USB HID v1.00 Device [Delcom Products Inc. USB IO Controller ] on usb-0000:00:14.0-5/input0 [ 107.511975] hid-led 0003:0FC5:B080.0002: Delcom Visual Signal Indicator G2 initialized -- 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
