diff -r 531cf2dab058 sys/dev/acpica/acpi_ec.c
--- a/sys/dev/acpica/acpi_ec.c	Mon Nov 19 17:31:36 2018 -0500
+++ b/sys/dev/acpica/acpi_ec.c	Wed Nov 21 10:52:58 2018 -0500
@@ -338,7 +338,6 @@
     ACPI_HANDLE h;
     ACPI_OBJECT *obj;
     ACPI_STATUS status;
-    device_t	peer;
     char	desc[64];
     int		ecdt;
     int		ret;
@@ -422,6 +421,7 @@
     /* Store the values we got from the namespace for attach. */
     acpi_set_private(dev, params);
 
+#if 0
     /*
      * Check for a duplicate probe. This can happen when a probe via ECDT
      * succeeded already. If this is a duplicate, disable this device.
@@ -431,6 +431,7 @@
 	ret = 0;
     else
 	device_disable(dev);
+#endif
 
     if (buf.Pointer)
 	AcpiOsFree(buf.Pointer);