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vga: fix region checks in wraparound case

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Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-id: 20171030102830.4469-1-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2017-10-30 11:28:30 +01:00
parent c53f5b89f1
commit 115788d7a7
1 changed files with 2 additions and 2 deletions
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4
hw/display/vga.c
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@ -1666,9 +1666,9 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
/* scanline wraps from end of video memory to the start */
assert(force_shadow);
update = memory_region_snapshot_get_dirty(&s->vram, snap,
page0, 0);
page0, s->vbe_size - page0);
update |= memory_region_snapshot_get_dirty(&s->vram, snap,
page1, 0);
0, page1);
} else {
update = memory_region_snapshot_get_dirty(&s->vram, snap,
page0, page1 - page0);