D37408.diff
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	diff --git a/usr.sbin/bhyve/pci_xhci.c b/usr.sbin/bhyve/pci_xhci.c
	--- a/usr.sbin/bhyve/pci_xhci.c
	+++ b/usr.sbin/bhyve/pci_xhci.c
	@@ -568,6 +568,10 @@
	*/
	p->porthlpmc = value;
	break;
	+ default:
	+ DPRINTF(("pci_xhci: unaligned portreg write offset %#lx",
	+ offset));
	+ break;
	}
	}

	@@ -2132,12 +2136,13 @@
	{
	struct pci_xhci_portregs *portregs;
	int port;
	- uint32_t *p;
	+ uint32_t reg;

	if (sc->portregs == NULL)
	return (0);

	- port = (offset - 0x3F0) / 0x10;
	+ port = (offset - XHCI_PORTREGS_PORT0) / XHCI_PORTREGS_SETSZ;
	+ offset = (offset - XHCI_PORTREGS_PORT0) % XHCI_PORTREGS_SETSZ;

	if (port > XHCI_MAX_DEVS) {
	DPRINTF(("pci_xhci: portregs_read port %d >= XHCI_MAX_DEVS",
	@@ -2147,16 +2152,31 @@
	return (XHCI_PS_SPEED_SET(3));
	}

	- offset = (offset - 0x3F0) % 0x10;
	-
	portregs = XHCI_PORTREG_PTR(sc, port);
	- p = &portregs->portsc;
	- p += offset / sizeof(uint32_t);
	+ switch (offset) {
	+ case 0:
	+ reg = portregs->portsc;
	+ break;
	+ case 4:
	+ reg = portregs->portpmsc;
	+ break;
	+ case 8:
	+ reg = portregs->portli;
	+ break;
	+ case 12:
	+ reg = portregs->porthlpmc;
	+ break;
	+ default:
	+ DPRINTF(("pci_xhci: unaligned portregs read offset %#lx",
	+ offset));
	+ reg = 0xffffffff;
	+ break;
	+ }

	DPRINTF(("pci_xhci: portregs read offset 0x%lx port %u -> 0x%x",
	- offset, port, *p));
	+ offset, port, reg));

	- return (*p);
	+ return (reg);
	}

	static void