From d1266c856fbd759cbc6cf583c5221aab49962b30 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beat=20K=C3=BCng?= <beat-kueng@gmx.net>
Date: Thu, 14 Sep 2023 11:41:04 +0200
Subject: [PATCH] rc_input: prevent error output during boot on boards with
 px4io

output:
INFO  [rc_input] valid device required
ERROR [rc_input] Task start failed (-1)
---
 src/drivers/rc_input/RCInput.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/drivers/rc_input/RCInput.cpp b/src/drivers/rc_input/RCInput.cpp
index 5b1993eaac..5caab7e973 100644
--- a/src/drivers/rc_input/RCInput.cpp
+++ b/src/drivers/rc_input/RCInput.cpp
@@ -124,6 +124,7 @@ RCInput::task_spawn(int argc, char *argv[])
 	int ch;
 	const char *myoptarg = nullptr;
 	const char *device_name = nullptr;
+	bool silent = false;
 #if defined(RC_SERIAL_PORT)
 	device_name = RC_SERIAL_PORT;
 #endif // RC_SERIAL_PORT
@@ -133,6 +134,7 @@ RCInput::task_spawn(int argc, char *argv[])
 	// 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;
+		silent = true;
 	}
 
 #endif // RC_SERIAL_PORT && PX4IO_SERIAL_DEVICE
@@ -141,6 +143,7 @@ RCInput::task_spawn(int argc, char *argv[])
 		switch (ch) {
 		case 'd':
 			device_name = myoptarg;
+			silent = false;
 			break;
 
 		case '?':
@@ -173,6 +176,9 @@ RCInput::task_spawn(int argc, char *argv[])
 
 		return PX4_OK;
 
+	} else if (silent) {
+		return PX4_OK;
+
 	} else {
 		if (device_name) {
 			PX4_ERR("invalid device (-d) %s", device_name);