Index: sys/dev/acpica/acpi.c
===================================================================
--- sys/dev/acpica/acpi.c	(revision 274350)
+++ sys/dev/acpica/acpi.c	(working copy)
@@ -710,7 +710,7 @@ acpi_set_power_children(device_t dev, int state)
 		child = devlist[i];
 		dstate = state;
 		if (device_is_attached(child) &&
-		    acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0)
+		    acpi_device_pwr_for_sleep(parent, child, &dstate) == 0)
 			acpi_set_powerstate(child, dstate);
 	}
 	free(devlist, M_TEMP);
Index: sys/dev/pci/pci.c
===================================================================
--- sys/dev/pci/pci.c	(revision 274350)
+++ sys/dev/pci/pci.c	(working copy)
@@ -3651,7 +3651,7 @@ pci_set_power_child(device_t dev, device_t child,
 	dinfo = device_get_ivars(child);
 	dstate = state;
 	if (device_is_attached(child) &&
-	    PCIB_POWER_FOR_SLEEP(pcib, dev, &dstate) == 0)
+	    PCIB_POWER_FOR_SLEEP(pcib, child, &dstate) == 0)
 		pci_set_powerstate(child, dstate);
 }