in drivers/misc/sfp/amzn-sfp.c [390:404]
static int amzn_sfp_remove(struct i2c_client *client)
{
	struct amzn_sfp_softc *sc;
	/* Paranoia... */
	if (client == NULL)
		return -EINVAL;
	sc = i2c_get_clientdata(client);
	if (sc == NULL)
		return -ENODEV;
	i2c_set_clientdata(client, NULL);
	sysfs_remove_bin_file(&client->dev.kobj, &sc->attr);
	return 0;
}