From 540d918a09b5d3d7282c665c37eb920b7cc01fc4 Mon Sep 17 00:00:00 2001
From: Robert Schmidt <robert.schmidt@openairinterface.org>
Date: Thu, 16 Jan 2025 13:22:23 +0100
Subject: [PATCH] Detect double sync message and skip frames

---
 radio/fhi_72/oaioran.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/radio/fhi_72/oaioran.c b/radio/fhi_72/oaioran.c
index ef8e81dbc5..034035b4bc 100644
--- a/radio/fhi_72/oaioran.c
+++ b/radio/fhi_72/oaioran.c
@@ -280,6 +280,16 @@ int xran_fh_rx_read_slot(ru_info_t *ru, int *frame, int *slot)
 #ifndef USE_POLLING
   // pull next even from oran_sync_fifo
   notifiedFIFO_elt_t *res = pullNotifiedFIFO(&oran_sync_fifo);
+
+  notifiedFIFO_elt_t *f;
+  while ((f = pollNotifiedFIFO(&oran_sync_fifo)) != NULL) {
+    oran_sync_info_t *old_info = NotifiedFifoData(res);
+    oran_sync_info_t *new_info = NotifiedFifoData(f);
+    LOG_E(PHY, "Detected double sync message %d.%d => %d.%d\n", old_info->f, old_info->sl, new_info->f, new_info->sl);
+    delNotifiedFIFO_elt(res);
+    res = f;
+  }
+
   oran_sync_info_t *info = NotifiedFifoData(res);
 
   *slot = info->sl;