From a1a4849c419337f649c6633219b555eb4d4d955a Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Wed, 16 May 2007 22:11:09 -0700 Subject: [PATCH] Refine SCREEN_INFO sanity check for vgacon initialization Refine SCREEN_INFO sanity check for vgacon initialization. Checking video mode field only to see whenever SCREEN_INFO is initialized is not enougth, in some cases it is zero although a vga card is present. Lets additionally check cols and lines. Signed-off-by: Gerd Hoffmann Cc: Rusty Russell Cc: Andi Kleen Cc: Alan Cc: Ingo Molnar Acked-by: Eric W. Biederman Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/console/vgacon.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c index 2460b82a1d..f46fe95f69 100644 --- a/drivers/video/console/vgacon.c +++ b/drivers/video/console/vgacon.c @@ -368,9 +368,14 @@ static const char *vgacon_startup(void) #endif } + /* SCREEN_INFO initialized? */ + if ((ORIG_VIDEO_MODE == 0) && + (ORIG_VIDEO_LINES == 0) && + (ORIG_VIDEO_COLS == 0)) + goto no_vga; + /* VGA16 modes are not handled by VGACON */ - if ((ORIG_VIDEO_MODE == 0x00) || /* SCREEN_INFO not initialized */ - (ORIG_VIDEO_MODE == 0x0D) || /* 320x200/4 */ + if ((ORIG_VIDEO_MODE == 0x0D) || /* 320x200/4 */ (ORIG_VIDEO_MODE == 0x0E) || /* 640x200/4 */ (ORIG_VIDEO_MODE == 0x10) || /* 640x350/4 */ (ORIG_VIDEO_MODE == 0x12) || /* 640x480/4 */ -- 2.39.5