{
        struct iwl_host_cmd hcmd = {
                .id = SCAN_OFFLOAD_REQUEST_CMD,
-               .len = { sizeof(struct iwl_scan_req_lmac) +
-                        sizeof(struct iwl_scan_channel_cfg_lmac) *
-                               mvm->fw->ucode_capa.n_scan_channels +
-                        sizeof(struct iwl_scan_probe_req), },
+               .len = { iwl_mvm_scan_size(mvm), },
                .data = { mvm->scan_cmd, },
                .dataflags = { IWL_HCMD_DFL_NOCOPY, },
        };
 {
        struct iwl_host_cmd hcmd = {
                .id = SCAN_OFFLOAD_REQUEST_CMD,
-               .len = { sizeof(struct iwl_scan_req_lmac) +
-                        sizeof(struct iwl_scan_channel_cfg_lmac) *
-                               mvm->fw->ucode_capa.n_scan_channels +
-                        sizeof(struct iwl_scan_probe_req), },
+               .len = { iwl_mvm_scan_size(mvm), },
                .data = { mvm->scan_cmd, },
                .dataflags = { IWL_HCMD_DFL_NOCOPY, },
        };