[Qemu-devel] [PATCH] vga: fix region checks in wraparound case

[Gerd Hoffmann <kraxel@redhat.com>]

Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/display/vga.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/display/vga.c b/hw/display/vga.c
index 1d19f6b..a64a094 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -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);
-- 
2.9.3