fbdev: ignore VESA modes if framebuffer is disabled

If the option vga=<VESA graphics mode> is added to the boot parameter, it will
activate graphics mode, but without any framebuffer support, the user is left
with an unusable display.

Change the behavior such that the user is instead prompted for another mode
(ala vga=ask).

NOTE: People can always use vbetool to set a graphics mode if this is really
desired, but the number of people doing this approaches zero.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/i386/boot/video.S b/arch/i386/boot/video.S
index 8143c9516cb4..5e2280cf4456 100644
--- a/arch/i386/boot/video.S
+++ b/arch/i386/boot/video.S
@@ -496,9 +496,11 @@ mode_set:
         cmpb    $VIDEO_FIRST_V7>>8, %ah
         jz      setv7
         
+#ifdef CONFIG_FB
         cmpb    $VIDEO_FIRST_VESA>>8, %ah
         jnc     check_vesa
-        
+#endif
+
         orb     %ah, %ah
         jz      setmenu