[x86 setup] The current display page is returned in %bh, not %bl

The current display page is an 8-bit number, even though struct
screen_info gives it a 16-bit number.  The number is returned in %bh,
so it needs to be >> 8 before storing.

Special thanks to Jeff Chua for detailed bug reporting.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/arch/i386/boot/video.c b/arch/i386/boot/video.c
index 958130e..693f20d 100644 (file)
--- a/arch/i386/boot/video.c
+++ b/arch/i386/boot/video.c
@@ -61,7 +61,7 @@ static void store_video_mode(void)
 
        /* Not all BIOSes are clean with respect to the top bit */
        boot_params.screen_info.orig_video_mode = ax & 0x7f;
-       boot_params.screen_info.orig_video_page = page;
+       boot_params.screen_info.orig_video_page = page >> 8;
 }
 
 /*