NCM_STATUS_BYTECOUNT
request->buf = kmalloc(NCM_STATUS_BYTECOUNT, GFP_KERNEL);
.wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
.wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
.wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
.wBytesPerInterval = cpu_to_le16(NCM_STATUS_BYTECOUNT),
req->length = NCM_STATUS_BYTECOUNT;