savage: a fix for respawn crash regression

[Mikko Rapeli]

Hello, 

The savage driver some time a go started crashing when respawned from
kdm et al. When MapMMIO and MapFB functions were merged to MapMem[1], one 
MapFB call in SavageScreenInit was not replaced with MapMem:

http://gitweb.freedesktop.org/?p=xorg/driver/xf86-video-savage.git;a=commitdiff_plain;h=2f8352df6488476b0c1a46798eca5dd38827444b;hp=6f9abbb972834561cd8494a1d4fb47402b285d7d

Here's a patch which fixes the issue. It works on my Thinkpad T20,
though I don't really understand the details.

-Mikko

--- xserver-xorg-video-savage-2.1.2.orig/src/savage_driver.c
+++ xserver-xorg-video-savage-2.1.2/src/savage_driver.c
@@ -3088,6 +3088,9 @@
  
     SavageEnableMMIO(pScrn);
 
+    if (!SavageMapMem(pScrn))
+        return FALSE;
+
     psav->FBStart2nd = 0;
 
     if (psav->overlayDepth) {