/* iwm_stop() (Called at netdev interface bringdown time) -> iwm_down() -> iwm_bus_disable() -> if_sdio_disable() (In case of an SDIO bus) -> sdio_disable_func()  */
static int iwm_open(struct net_device *ndev)
/* iwm_stop() (Called at netdev interface bringdown time) -> iwm_down() -> iwm_bus_disable() -> if_sdio_disable() (In case of an SDIO bus) -> sdio_disable_func()  */
static int iwm_open(struct net_device *ndev)
{
	struct iwm_priv *iwm = ndev_to_iwm(ndev);
	return iwm_up(iwm);
}