dri2: Register the DRI2DrawableType after server regeneration

The Resource database is reset upon regeneration and so the dri2 module
needs to re-register its RESTYPE for the drawable or else it will
clobber the next unsuspecting user of the database. Fortunately, DRI2 is
loaded late in the initialisation sequence and was last up until
xf86-video-intel started using the Resource database to track
outstanding swaps...

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jeremy Huddleston <jeremyhu@apple.com>
Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

hw/xfree86/dri2/dri2.c

@@ -1235,14 +1235,24 @@ DRI2CloseScreen(ScreenPtr pScreen)
 }
 
 extern ExtensionModule dri2ExtensionModule;
+extern Bool DRI2ModuleSetup(void);
+
+/* Called by InitExtensions() */
+Bool
+DRI2ModuleSetup(void)
+{
+    dri2DrawableRes = CreateNewResourceType(DRI2DrawableGone, "DRI2Drawable");
+    if (!dri2DrawableRes)
+	return FALSE;
+
+    return TRUE;
+}
 
 static pointer
 DRI2Setup(pointer module, pointer opts, int *errmaj, int *errmin)
 {
     static Bool setupDone = FALSE;
 
-    dri2DrawableRes = CreateNewResourceType(DRI2DrawableGone, "DRI2Drawable");
-
     if (!setupDone)
     {
 	setupDone = TRUE;

hw/xfree86/dri2/dri2ext.c

@@ -50,6 +50,7 @@
 #include "xf86Module.h"
 
 static ExtensionEntry	*dri2Extension;
+extern Bool DRI2ModuleSetup(void);
 
 static Bool
 validDrawable(ClientPtr client, XID drawable, Mask access_mode,
@@ -634,6 +635,8 @@ DRI2ExtensionInit(void)
 				 StandardMinorOpcode);
 
     DRI2EventBase = dri2Extension->eventBase;
+
+    DRI2ModuleSetup();
 }
 
 extern Bool noDRI2Extension;