[PATCH 3/5] qla2xxx: Restrict max_luns to 16-bit for older HBAs

[Hannes Reinecke <hare@suse.de>]

Older HBAs are only capable of supporting 16-bit LUNs,
so we need to make sure to adjust the 'ql2xmaxlun'
parameter accordingly.

Cc: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/scsi/qla2xxx/qla_os.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 89a5300..a088e5b 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2600,6 +2600,11 @@ 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;
+	if (!IS_QLAFX00(ha) && !IS_FWI2_CAPABLE(ha)) {
+		/* HW supports only 16-bit LUNs */
+		if (ql2xmaxlun > 0xffff)
+			ql2xmaxlun = 0xffff;
+	}
 	host->max_lun = ql2xmaxlun;
 	host->transportt = qla2xxx_transport_template;
 	sht->vendor_id = (SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_QLOGIC);
-- 
1.7.12.4