rphy_to_end_device
struct sas_end_device *rdev = rphy_to_end_device(dev->rphy);
struct sas_end_device *rdev = rphy_to_end_device(rphy); \
struct sas_end_device *edev = rphy_to_end_device(rphy);
rdev = rphy_to_end_device(rphy);