- Fixed bug in mga driver which caused hangs on some Matrox Mystique boards
  of revision 0->2, which were caused by a previous upstream bugfix for
  another issue.  xorg-x11-6.7.0-mga-storm-sync-fix.patch (#124028)

Should fix bugzilla:  https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=124028
Needs testing, and needs to be committed to X.Org CVS.

--- xc/programs/Xserver/hw/xfree86/drivers/mga/mga_storm.c.mga-storm-sync-fix	2004-06-25 21:04:50.000000000 -0400
+++ xc/programs/Xserver/hw/xfree86/drivers/mga/mga_storm.c	2004-06-25 21:23:46.000000000 -0400
@@ -1076,8 +1076,8 @@
 
     CHECK_DMA_QUIESCENT(pMga, pScrn);
 
-    /* This reportedly causes a freeze for the Mystique. */
-    if (pMga->Chipset != PCI_CHIP_MGA1064)
+    /* MGAISBUSY() reportedly causes a freeze for Mystique revision 2 and older */
+    if (!(pMga->Chipset == PCI_CHIP_MGA1064 && (pMga->ChipRev >= 0 && pMga->ChipRev <= 2)))
 	while(MGAISBUSY());
     /* flush cache before a read (mga-1064g 5.1.6) */
     OUTREG8(MGAREG_CRTC_INDEX, 0);