IPC_MEM_DL_ETH_OFFSET
ipc_mux->session[if_id].dl_head_pad_len = IPC_MEM_DL_ETH_OFFSET;
param.open_session.dl_head_pad_len = cpu_to_le32(IPC_MEM_DL_ETH_OFFSET);
if (session->ul_head_pad_len > IPC_MEM_DL_ETH_OFFSET)
pad_len = session->ul_head_pad_len - IPC_MEM_DL_ETH_OFFSET;
if (session->ul_head_pad_len > IPC_MEM_DL_ETH_OFFSET)
head_pad_len = session->ul_head_pad_len - IPC_MEM_DL_ETH_OFFSET;
ipc_mux->session[if_id].dl_head_pad_len - IPC_MEM_DL_ETH_OFFSET;
IPC_MEM_DL_ETH_OFFSET);