From 3e9f6e3c454715380dfe5e1399a2aceb8f452b04 Mon Sep 17 00:00:00 2001
From: Maciej Pasternacki <maciej@3ofcoins.net>
Date: Sat, 20 Feb 2021 18:30:54 +0100
Subject: [PATCH] Report success in binary SPI write-then-read when there's
 nothing to read

---
 Firmware/spi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Firmware/spi.c b/Firmware/spi.c
index 2d79dd33..b6820299 100644
--- a/Firmware/spi.c
+++ b/Firmware/spi.c
@@ -1036,6 +1036,8 @@ void spi_read_write_io(const bool engage_cs) {
 
   if (bytes_to_read > 0) {
     spi_read_to_uart(bytes_to_read);
+  } else {
+    REPORT_IO_SUCCESS();
   }
 
   /* Reset the CS line if needed. */