From 3e74093fc7722b78558d8852ea74cf6cb9b04267 Mon Sep 17 00:00:00 2001
From: Thomas Kolb <cfr34k-git@tkolb.de>
Date: Thu, 7 Apr 2022 20:58:08 +0200
Subject: [PATCH] Retry transmitting zeros

---
 impl/src/sdr/sdr.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/impl/src/sdr/sdr.c b/impl/src/sdr/sdr.c
index dccdf45..7113b1e 100644
--- a/impl/src/sdr/sdr.c
+++ b/impl/src/sdr/sdr.c
@@ -214,7 +214,13 @@ result_t sdr_flush_tx_buffer(sdr_ctx_t *ctx)
 
 	for(int i = 0; i < 4; i++) {
 		fprintf(stderr, "z");
-		sdr_transmit(ctx, zeros, sizeof(zeros)/sizeof(zeros[0]), 100000);
+
+		unsigned tries = 0;
+		int ret;
+
+		do {
+			ret = sdr_transmit(ctx, zeros, sizeof(zeros)/sizeof(zeros[0]), 100000);
+		} while(ret <= 0 && tries++ < 3);
 	}
 
 	return OK;