From a8897ca8cab38d15d19d2e0fdc86df7815b2f04f Mon Sep 17 00:00:00 2001
From: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Date: Tue, 17 May 2016 17:18:09 +0200
Subject: [PATCH] tools: hidpp20-dump: prevent segfault when called on non
 HID++ device

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
---
 tools/hidpp20-dump-page.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/hidpp20-dump-page.c b/tools/hidpp20-dump-page.c
index f733902a..05ceb649 100644
--- a/tools/hidpp20-dump-page.c
+++ b/tools/hidpp20-dump-page.c
@@ -111,6 +111,8 @@ main(int argc, char **argv)
 
 	hidpp_device_init(&base, fd);
 	dev = hidpp20_device_new(&base, 0xff);
+	if (!dev)
+		error(1, 0, "Failed to open %s as a HID++ 2.0 device", path);
 
 	if (argc == 2)
 		rc = dump_everything(dev);