netxen: fix physical port mapping

The PCI function to physical port mapping is valid only for
old firmware. New firmware (4.0.0+) abstracts this.
So driver should never try to access phy using invalid
mapping. The behavior is unpredictable when PCI functions
4-7 are enabled on the same NIC.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/net/netxen/netxen_nic_main.c b/drivers/net/netxen/netxen_nic_main.c
index 9f33e442f403..f42581157f4e 100644
--- a/drivers/net/netxen/netxen_nic_main.c
+++ b/drivers/net/netxen/netxen_nic_main.c
@@ -795,9 +795,12 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
          * See if the firmware gave us a virtual-physical port mapping.
          */
         adapter->physical_port = adapter->portnum;
-        i = adapter->pci_read_normalize(adapter, CRB_V2P(adapter->portnum));
-        if (i != 0x55555555)
-                adapter->physical_port = i;
+        if (adapter->fw_major < 4) {
+                i = adapter->pci_read_normalize(adapter,
+                                CRB_V2P(adapter->portnum));
+                if (i != 0x55555555)
+                        adapter->physical_port = i;
+        }
 
         adapter->flags &= ~(NETXEN_NIC_MSI_ENABLED | NETXEN_NIC_MSIX_ENABLED);