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7cdc61becd vga: fix region calculation 

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Merge remote-tracking branch 'remotes/kraxel/tags/vga-20180312-pull-request' into staging

7cdc61becd vga: fix region calculation

# gpg: Signature made Mon 12 Mar 2018 10:59:24 GMT
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/vga-20180312-pull-request:
  vga: fix region calculation

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-03-12 18:35:37 +00:00
parent 6ceb1b51f0 7cdc61becd
commit fb5fff1588
1 changed files with 2 additions and 0 deletions
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2
hw/display/vga.c
View File

@ -1483,6 +1483,8 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
region_start = (s->start_addr * 4);
region_end = region_start + (ram_addr_t)s->line_offset * height;
region_end += width * s->get_bpp(s) / 8; /* scanline length */
region_end -= s->line_offset;
if (region_end > s->vbe_size) {
/* wraps around (can happen with cirrus vbe modes) */
region_start = 0;