[PATCH] ignore vgacon if hardware not present

[Rusty Russell]

(Did this fall through the cracks?  I don't see it in -mm.  It's
standalone, and saves some silly code in lguest and presumably others).
==

Avoid trying to set up vgacon if there's no vga hardware present.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
From: Gerd Hoffmann <kraxel@xxxxxxx>
Cc: Alan <alan@xxxxxxxxxxxxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>

---
 drivers/video/console/vgacon.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

===================================================================
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -372,7 +372,8 @@ static const char *vgacon_startup(void)
 	}
 
 	/* VGA16 modes are not handled by VGACON */
-	if ((ORIG_VIDEO_MODE == 0x0D) ||	/* 320x200/4 */
+	if ((ORIG_VIDEO_MODE == 0x00) ||	/* SCREEN_INFO not initialized */
+	    (ORIG_VIDEO_MODE == 0x0D) ||	/* 320x200/4 */
 	    (ORIG_VIDEO_MODE == 0x0E) ||	/* 640x200/4 */
 	    (ORIG_VIDEO_MODE == 0x10) ||	/* 640x350/4 */
 	    (ORIG_VIDEO_MODE == 0x12) ||	/* 640x480/4 */


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