D32011.id95329.diff
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	Index: sys/dev/pci/pci_pci.c
	===================================================================
	--- sys/dev/pci/pci_pci.c
	+++ sys/dev/pci/pci_pci.c
	@@ -2364,7 +2364,20 @@
	start, end));

	#ifdef PCI_RES_BUS
	- if (type != PCI_RES_BUS)
	+ if (type == PCI_RES_BUS) {
	+ /*
	+ * If our bus range isn't big enough to grow the sub-allocation
	+ * then we need to grow our bus range. Any request that would
	+ * require us to decrease the start of our own bus range is
	+ * invalid, we can only extend the end; ignore such requests
	+ * and let rman_adjust_resource fail below.
	+ */
	+ if (start >= sc->bus.sec && end > sc->bus.sub) {
	+ error = pcib_grow_subbus(&sc->bus, end);
	+ if (error != 0)
	+ return (error);
	+ }
	+ } else
	#endif
	{
	/*