rndis_msg_size += NDIS_VLAN_PPI_SIZE;
                ppi = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE,
-                                       IEEE_8021Q_INFO);
-               vlan = (struct ndis_pkt_8021q_info *)((void *)ppi +
-                                               ppi->ppi_offset);
+                                   IEEE_8021Q_INFO);
+
+               vlan = (void *)ppi + ppi->ppi_offset;
                vlan->vlanid = skb->vlan_tci & VLAN_VID_MASK;
                vlan->pri = (skb->vlan_tci & VLAN_PRIO_MASK) >>
                                VLAN_PRIO_SHIFT;
                ppi = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE,
                                    TCP_LARGESEND_PKTINFO);
 
-               lso_info = (struct ndis_tcp_lso_info *)((void *)ppi +
-                                                       ppi->ppi_offset);
+               lso_info = (void *)ppi + ppi->ppi_offset;
 
                lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE;
                if (skb->protocol == htons(ETH_P_IP)) {