GPD_DATA_LEN
gpd->dw3_info = cpu_to_le32(GPD_DATA_LEN(mtu, req->length));
if (GPD_DATA_LEN(mtu, le32_to_cpu(gpd_current->dw3_info)) != 0) {
request->actual = GPD_DATA_LEN(mtu, le32_to_cpu(gpd->dw3_info));
req->actual = GPD_DATA_LEN(mtu, le32_to_cpu(gpd->dw3_info));