MR_FW_RAID_MAP_EXT
fusion->new_map_sz = sizeof(struct MR_FW_RAID_MAP_EXT);
struct MR_FW_RAID_MAP_EXT *fw_map_ext;
(struct MR_FW_RAID_MAP_EXT *)fusion->ld_map[(map_id & 1)];
cpu_to_le32(sizeof(struct MR_FW_RAID_MAP_EXT));
expected_size = sizeof(struct MR_FW_RAID_MAP_EXT);