Use a tighter check to see if a resource allocation request is for a

specific request and thus should first try to be allocated from the
sys_resource pool.  This avoids using the sys_resource pool for wildcard
requests that have bounded ranges coming from cbb(4) and Host-PCI pcib(4)
drivers.

Tested by:	Andrea Bittau <a.bittau of cs.ucl.ac.uk fame>
Sleuthing by:	Andrea Bittau as well

sys/dev/acpica/acpi.c

@@ -1034,7 +1034,7 @@ acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
      * the request from our system resource regions.  If we can't, pass the
      * request up to the parent.
      */
-    if (!(start == 0UL && end == ~0UL) && rm != NULL)
+    if (start + count - 1 == end && rm != NULL)
 	res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
 	    child);
     if (res == NULL) {