D27549.diff
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	diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c
	--- a/sys/dev/pci/pci.c
	+++ b/sys/dev/pci/pci.c
	@@ -493,6 +493,28 @@
	return (NULL);
	}

	+device_t
	+pci_find_class_from(uint8_t class, uint8_t subclass, device_t from)
	+{
	+ struct pci_devinfo *dinfo;
	+ bool found = false;
	+
	+ STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
	+ if (from != NULL && found == false) {
	+ if (from != dinfo->cfg.dev)
	+ continue;
	+ found = true;
	+ continue;
	+ }
	+ if (dinfo->cfg.baseclass == class &&
	+ dinfo->cfg.subclass == subclass) {
	+ return (dinfo->cfg.dev);
	+ }
	+ }
	+
	+ return (NULL);
	+}
	+
	static int
	pci_printf(pcicfgregs cfg, const char fmt, ...)
	{
	diff --git a/sys/dev/pci/pcivar.h b/sys/dev/pci/pcivar.h
	--- a/sys/dev/pci/pcivar.h
	+++ b/sys/dev/pci/pcivar.h
	@@ -666,6 +666,7 @@
	device_t pci_find_dbsf(uint32_t, uint8_t, uint8_t, uint8_t);
	device_t pci_find_device(uint16_t, uint16_t);
	device_t pci_find_class(uint8_t class, uint8_t subclass);
	+device_t pci_find_class_from(uint8_t class, uint8_t subclass, device_t devfrom);

	/* Can be used by drivers to manage the MSI-X table. */
	int pci_pending_msix(device_t dev, u_int index);