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diff --git a/sys/dev/iicbus/gpio/pcf8574.c b/sys/dev/iicbus/gpio/pcf8574.c
--- a/sys/dev/iicbus/gpio/pcf8574.c
+++ b/sys/dev/iicbus/gpio/pcf8574.c
@@ -159,9 +159,7 @@
sc = device_get_softc(dev);
- if (sc->busdev != NULL)
- gpiobus_detach_bus(sc->busdev);
-
+ gpiobus_detach_bus(dev);
sx_destroy(&sc->lock);
return (0);
}
diff --git a/sys/dev/iicbus/gpio/tca64xx.c b/sys/dev/iicbus/gpio/tca64xx.c
--- a/sys/dev/iicbus/gpio/tca64xx.c
+++ b/sys/dev/iicbus/gpio/tca64xx.c
@@ -292,9 +292,7 @@
sc = device_get_softc(dev);
- if (sc->busdev != NULL)
- gpiobus_detach_bus(sc->busdev);
-
+ gpiobus_detach_bus(dev);
mtx_destroy(&sc->mtx);
return (0);

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