stop dirty logging while updating cirrus bank memory (Glauber Costa)

Otherwise, slot tracking gets confused.

This fixes a screen corruption bug with Ubuntu guest installation.
Signed-off-by: NGlauber Costa <glommer@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6851 c046a42c-6fe2-441c-8c8c-71466251a162

hw/cirrus_vga.c

@@ -2637,11 +2637,16 @@ static void map_linear_vram(CirrusVGAState *s)
 
     s->lfb_vram_mapped = 0;
 
+    cpu_register_physical_memory(isa_mem_base + 0xa0000, 0x8000,
+                                (s->vram_offset + s->cirrus_bank_base[0]) | IO_MEM_UNASSIGNED);
+    cpu_register_physical_memory(isa_mem_base + 0xa8000, 0x8000,
+                                (s->vram_offset + s->cirrus_bank_base[1]) | IO_MEM_UNASSIGNED);
     if (!(s->cirrus_srcptr != s->cirrus_srcptr_end)
         && !((s->sr[0x07] & 0x01) == 0)
         && !((s->gr[0x0B] & 0x14) == 0x14)
         && !(s->gr[0x0B] & 0x02)) {
 
+        vga_dirty_log_stop((VGAState *)s);
         cpu_register_physical_memory(isa_mem_base + 0xa0000, 0x8000,
                                     (s->vram_offset + s->cirrus_bank_base[0]) | IO_MEM_RAM);
         cpu_register_physical_memory(isa_mem_base + 0xa8000, 0x8000,