scsi: sd: Signal drive managed SMR disks

Print a message indicating that a disk is a drive-managed SMR model when
such drive is found using the ZONED field of the Block Device
Characteristics VPD page (IDENTIFY data on ATA side).

[mkp: typo]

Link: https://lore.kernel.org/r/20200514081953.1252087-1-damien.lemoal@wdc.comReviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/sd.c

@@ -2955,6 +2955,9 @@ static void sd_read_block_characteristics(struct scsi_disk *sdkp)
 			 * with partitions as regular block devices.
 			 */
 			q->limits.zoned = BLK_ZONED_NONE;
+			if (sdkp->zoned == 2 && sdkp->first_scan)
+				sd_printk(KERN_NOTICE, sdkp,
+					  "Drive-managed SMR disk\n");
 		}
 	}
 	if (blk_queue_is_zoned(q) && sdkp->first_scan)