libata: cleanup ata_scsi_qc_complete

Remove an incorrect comment and untangle an if statement in
ata_scsi_qc_complete.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>

drivers/ata/libata-scsi.c

@@ -1774,21 +1774,12 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
 	 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
 	 */
 	if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
-	    ((cdb[2] & 0x20) || need_sense)) {
+	    ((cdb[2] & 0x20) || need_sense))
 		ata_gen_passthru_sense(qc);
-	} else {
-		if (!need_sense) {
-			cmd->result = SAM_STAT_GOOD;
-		} else {
-			/* TODO: decide which descriptor format to use
-			 * for 48b LBA devices and call that here
-			 * instead of the fixed desc, which is only
-			 * good for smaller LBA (and maybe CHS?)
-			 * devices.
-			 */
+	else if (need_sense)
 		ata_gen_ata_sense(qc);
-		}
-	}
+	else
+		cmd->result = SAM_STAT_GOOD;
 
 	if (need_sense && !ap->ops->error_handler)
 		ata_dump_status(ap->print_id, &qc->result_tf);