From 54b5d4c5b82f8d7547a4047f374880c76d394698 Mon Sep 17 00:00:00 2001
From: Daniel Agar <daniel@agar.ca>
Date: Wed, 14 Sep 2022 19:16:23 -0400
Subject: [PATCH] drivers/rc_input: don't allow starting on the px4io serial
 port

---
 src/drivers/rc_input/RCInput.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/drivers/rc_input/RCInput.cpp b/src/drivers/rc_input/RCInput.cpp
index 4d1d023896..f13ede5679 100644
--- a/src/drivers/rc_input/RCInput.cpp
+++ b/src/drivers/rc_input/RCInput.cpp
@@ -128,6 +128,15 @@ RCInput::task_spawn(int argc, char *argv[])
 	device_name = RC_SERIAL_PORT;
 #endif // RC_SERIAL_PORT
 
+#if defined(RC_SERIAL_PORT) && defined(PX4IO_SERIAL_DEVICE)
+
+	// if RC_SERIAL_PORT == PX4IO_SERIAL_DEVICE then don't use it by default if the px4io is running
+	if ((strcmp(RC_SERIAL_PORT, PX4IO_SERIAL_DEVICE) == 0) && (access("/dev/px4io", R_OK) == 0)) {
+		device_name = nullptr;
+	}
+
+#endif // RC_SERIAL_PORT && PX4IO_SERIAL_DEVICE
+
 	while ((ch = px4_getopt(argc, argv, "d:", &myoptind, &myoptarg)) != EOF) {
 		switch (ch) {
 		case 'd':