qla2xxx: Restrict max_lun to 16-bit for older HBAs

Older HBAs are only capable of supporting 16-bit LUNs,
so we need to make sure to adjust max_lun accordingly.

Signed-off-by: Hannes Reinecke <[e-mail]>
Acked-by: Chad Dupuis <[e-mail]>
Reviewed-by: Ewan Milne <[e-mail]>
Signed-off-by: Christoph Hellwig <[e-mail]>

drivers/scsi/qla2xxx/qla_os.c

···
 	else
 		host->max_cmd_len = MAX_CMDSZ;
 	host->max_channel = MAX_BUSES - 1;
-	host->max_lun = ql2xmaxlun;
+	/* Older HBAs support only 16-bit LUNs */
+	if (!IS_QLAFX00(ha) && !IS_FWI2_CAPABLE(ha) &&
+	    ql2xmaxlun > 0xffff)
+		host->max_lun = 0xffff;
+	else
+		host->max_lun = ql2xmaxlun;
 	host->transportt = qla2xxx_transport_template;
 	sht->vendor_id = (SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_QLOGIC);