Command-Line Input
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	jhb
	Feb 9 2024, 1:37 AM

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Command-Line Input
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	diff --git a/sys/dev/pci/pci_pci.c b/sys/dev/pci/pci_pci.c
	index 6ef04251cd74..a6035b8cd8b6 100644
	--- a/sys/dev/pci/pci_pci.c
	+++ b/sys/dev/pci/pci_pci.c
	@@ -436,6 +436,20 @@ pcib_alloc_window(struct pcib_softc sc, struct pcib_window w, int type,
	if (!pcib_is_window_open(w))
	return;

	+ /*
	+ * Assume that a window where both the base and limit read as
	+ * zero is not really open, or at least not assigned a valid
	+ * range by the firmware. If devices behind this bridge have
	+ * firmware-assigned resources in this range then the window
	+ * will be allocated on-demand.
	+ */
	+ if (w->base == 0 && w->limit == (pci_addr_t)1 << w->step) {
	+ w->base = max_address;
	+ w->limit = 0;
	+ pcib_write_windows(sc, w->mask);
	+ return;
	+ }
	+
	if (w->base > max_address \|\| w->limit > max_address) {
	device_printf(sc->dev,
	"initial %s window has too many bits, ignoring\n", w->name);