From 6f5ebc54927419cb5f954a6595e4f6eecab6b36c Mon Sep 17 00:00:00 2001
From: Richard Hughes <richard@hughsie.com>
Date: Fri, 8 Jul 2022 16:14:40 +0100
Subject: [PATCH] Handle ENOTTY with the correct error code for ioctl calls

Fixes half of https://github.com/fwupd/fwupd/discussions/4810
---
 libfwupdplugin/fu-udev-device.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/libfwupdplugin/fu-udev-device.c b/libfwupdplugin/fu-udev-device.c
index 989fa7708..c8daf65e3 100644
--- a/libfwupdplugin/fu-udev-device.c
+++ b/libfwupdplugin/fu-udev-device.c
@@ -1534,11 +1534,19 @@ fu_udev_device_ioctl(FuUdevDevice *self,
 					    "permission denied");
 			return FALSE;
 		}
+		if (errno == ENOTTY) {
+			g_set_error_literal(error,
+					    FWUPD_ERROR,
+					    FWUPD_ERROR_NOT_SUPPORTED,
+					    "permission denied");
+			return FALSE;
+		}
 		g_set_error(error,
 			    FWUPD_ERROR,
 			    FWUPD_ERROR_INTERNAL,
-			    "ioctl error: %s",
-			    strerror(errno));
+			    "ioctl error: %s [%i]",
+			    strerror(errno),
+			    errno);
 #else
 		g_set_error(error, FWUPD_ERROR, FWUPD_ERROR_INTERNAL, "unspecified ioctl error");
 #endif