vga: do not resize the screen on hw_invalidate

Hi all,
currently vga always resizes the screen when vga_hw_invalidate is called
while this is not required and all the other graphic emulators don't.
This patch fixes it, making vga invalidate behaviour consistent with the
other emulated devices.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-Id: 

1 files changed, 3 insertions, 3 deletions

diff --git a/hw/vga.c b/hw/vga.c
index 4d74ffe2d9..53b5ff6d0d 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -1837,7 +1837,8 @@ static void vga_update_display(void *opaque)
     if (ds_get_bits_per_pixel(s->ds) == 0) {
         /* nothing to do */
     } else {
-        full_update = 0;
+        full_update = s->full_update;
+        s->full_update = 0;
         if (!(s->ar_index & 0x20)) {
             graphic_mode = GMODE_BLANK;
         } else {
@@ -1867,8 +1868,7 @@ static void vga_invalidate_display(void *opaque)
 {
     VGAState *s = (VGAState *)opaque;
 
-    s->last_width = -1;
-    s->last_height = -1;
+    s->full_update = 1;
 }
 
 void vga_reset(void *opaque)