From 755f516bbb983915d6cbfb5aa592cc0a5a99fd00 Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Tue, 3 Jun 2014 10:58:54 +0200
Subject: 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 <hare@suse.de>
Acked-by: Chad Dupuis <chad.dupuis@qlogic.com>
Reviewed-by: Ewan Milne <emilne@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index d96bfb5..5269aee 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2661,7 +2661,12 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	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);
 
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