SS_MASK
#define SS (SS_MASK << SS_SHIFT)
if ((seq & SS_MASK) != SS_DONE) {
scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
scsi_status = sts->scsi_status & cpu_to_le16((uint16_t)SS_MASK);