mac,phy: fixing pdcch order bug, do not process PDSCH if grant is pdcch order

srsue/src/phy/lte/cc_worker.cc

@@ -275,6 +275,9 @@ bool cc_worker::work_dl_regular()
 
       // Set RNTI
       ue_dl_cfg.cfg.pdsch.rnti = dci_dl.rnti;
+    } else {
+      ue_dl_cfg.cfg.pdsch.rnti            = dci_dl.rnti;
+      ue_dl_cfg.cfg.pdsch.grant.tb[0].tbs = 0;
     }
     // Generate MAC grant
     mac_interface_phy_lte::mac_grant_dl_t mac_grant = {};

srsue/src/stack/mac/mac.cc

@@ -433,6 +433,9 @@ void mac::new_grant_dl(uint32_t                               cc_idx,
       action->tb[0].rv            = grant.tb[0].rv;
       srsran_softbuffer_rx_reset_cb(&pch_softbuffer, 1);
     }
+  } else if (grant.is_pdcch_order) {
+    // if the grant is a PDCCH order then there is no associated PDSCH
+    action->tb[0].enabled = false;
   } else if (!(grant.rnti == SRSRAN_SIRNTI && cc_idx != 0)) {
     // If PDCCH for C-RNTI and RA procedure in Contention Resolution, notify it
     if (grant.rnti == uernti.get_crnti() && ra_procedure.is_contention_resolution()) {