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authorGerd Hoffmann <kraxel@redhat.com>2007-05-16 22:11:09 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-17 05:23:04 -0700
commita1a4849c419337f649c6633219b555eb4d4d955a (patch)
tree514e1cf01c52e5995a0143c20e5aea682b736f09
parent79974a0e4c6be6e9a3717b4c5a5d5c44c36b1653 (diff)
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 <kraxel@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Cc: Alan <alan@lxorguk.ukuu.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/video/console/vgacon.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index 2460b82a1d9..f46fe95f69f 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 */