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In a bus remove function the passed device is always valid, so there is no need to check for it being NULL. (Side note: The check for port being non-NULL is broken anyhow, because to_usb_serial_port() is a wrapper around container_of() for a member that is not the first one. So port can hardly become NULL.) Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Link: https://lore.kernel.org/r/20210208143149.963644-1-uwe@kleine-koenig.org Signed-off-by: Johan Hovold <johan@kernel.org>