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>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index d96bfb55e57b..5269aee1df3b 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);