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In detach(), check for failure of bus_generic_detach(), only release

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resources if they got allocated (because detach() gets called from attach()
to handle various failures), and delete the pwmbus child if it got created.
This commit is contained in:
Ian Lepore 2019-06-15 16:36:29 +00:00
parent dd47326c82
commit 5ef9c1079e
1 changed files with 10 additions and 2 deletions
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12
sys/arm/allwinner/aw_pwm.c
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@ -192,12 +192,20 @@ static int
aw_pwm_detach(device_t dev)
{
struct aw_pwm_softc *sc;
int error;
sc = device_get_softc(dev);
bus_generic_detach(sc->dev);
if (((error = bus_generic_detach(sc->dev)) != 0) {
device_printf(sc->dev, "cannot detach child devices\n");
return (error);
}
bus_release_resources(dev, aw_pwm_spec, &sc->res);
if (sc->busdev != NULL)
device_delete_child(dev, sc->busdev);
if (sc->res != NULL)
bus_release_resources(dev, aw_pwm_spec, &sc->res);
return (0);
}