From 3cbf6518d6eea08e0fbe6d7c609debac5ab31992 Mon Sep 17 00:00:00 2001
From: Emmanuel Vadot <manu@FreeBSD.org>
Date: Tue, 21 Jun 2022 15:52:49 +0200
Subject: [PATCH] fb: Add a default getinfo method

fb_getinfo is badly designed as it returns either the
info if the driver have the method or ENXIO via the kobj stuff
if the driver doesn't have it.
Add a default method that returns NULL as the code already checks this
and it avoid changing the interface.
None of the drm drivers supported have this method and it sometimes
fails and panic when loading them (for now only usb-c docks seems to be
affected).

MFC after:	3 days
Sponsored by:	Beckhoff Automation GmbH & Co. KG
---
 sys/dev/fb/fb_if.m | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/sys/dev/fb/fb_if.m b/sys/dev/fb/fb_if.m
index 53e4563bb6f5..938cececa409 100644
--- a/sys/dev/fb/fb_if.m
+++ b/sys/dev/fb/fb_if.m
@@ -3,6 +3,14 @@
 
 INTERFACE fb;
 
+CODE {
+	static struct fb_info *
+	fb_default_getinfo(device_t dev)
+	{
+		return (NULL);
+	}
+};
+
 METHOD struct fb_info * getinfo {
 	device_t dev;
-};
+} DEFAULT fb_default_getinfo;