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SubjectRe: [patches] [PATCH] [21/22] x86_64: Extend bzImage protocol for relocatable bzImage
On 5/9/07, Gerd Hoffmann <kraxel@redhat.com> wrote:
> 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>
> Cc: Eric W. Biederman <ebiederm@xmission.com>
> ---
> drivers/video/console/vgacon.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> Index: vanilla-2.6.21-git11/drivers/video/console/vgacon.c
> ===================================================================
> --- vanilla-2.6.21-git11.orig/drivers/video/console/vgacon.c
> +++ vanilla-2.6.21-git11/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 */
>
it works.

YH
-
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