_XkbSetDeviceInfo(ClientPtr client, DeviceIntPtr dev,
                  xkbSetDeviceInfoReq *stuff)
{
    unsigned                    change;
    char                       *wire;

    change = stuff->change;

    wire= (char *)&stuff[1];
    if (change&XkbXI_ButtonActionsMask) {
	if (!dev->button) {
	    client->errorValue = _XkbErrCode2(XkbErr_BadClass,ButtonClass);
	    return XkbKeyboardErrorCode;
	}
	if ((stuff->firstBtn+stuff->nBtns)>dev->button->numButtons) {
	    client->errorValue= _XkbErrCode4(0x02,stuff->firstBtn,stuff->nBtns,
						dev->button->numButtons);
	    return BadMatch;
	}
	wire+= (stuff->nBtns*SIZEOF(xkbActionWireDesc));
    }
    if (stuff->change&XkbXI_IndicatorsMask) {
	int status= Success;
	wire= CheckSetDeviceIndicators(wire,dev,stuff->nDeviceLedFBs,
							&status,client);
	if (status!=Success)
	    return status;
    }
    if (((wire-((char *)stuff))/4)!=stuff->length)
	return BadLength;

    return Success;
}