Index: head/sys/arm64/cavium/thunder_pcie_pem.c
===================================================================
--- head/sys/arm64/cavium/thunder_pcie_pem.c
+++ head/sys/arm64/cavium/thunder_pcie_pem.c
@@ -183,8 +183,16 @@
 thunder_pem_maxslots(device_t dev)
 {
 
+#if 0
 	/* max slots per bus acc. to standard */
 	return (PCI_SLOTMAX);
+#else
+	/*
+	 * ARM64TODO Workaround - otherwise an em(4) interface appears to be
+	 * present on every PCI function on the bus to which it is connected
+	 */
+	return (0);
+#endif
 }
 
 static int