cxgb4: Fix for write-combining stats configuration

The write-combining configuration register SGE_STAT_CFG_A needs to
be configured after FW initializes the adapter, else FW will reset
the configuration

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 592a4d66169c711ccef3b94dcbc626b13fd374f5..f5dcde27e40281d3b7dc8cf05468eec704b98f40 100644 (file)
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -4719,8 +4719,6 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
                        err = -ENOMEM;
                        goto out_free_adapter;
                }
-               t4_write_reg(adapter, SGE_STAT_CFG_A,
-                            STATSOURCE_T5_V(7) | STATMODE_V(0));
        }
 
        setup_memwin(adapter);
@@ -4732,6 +4730,11 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
        if (err)
                goto out_unmap_bar;
 
+       /* configure SGE_STAT_CFG_A to read WC stats */
+       if (!is_t4(adapter->params.chip))
+               t4_write_reg(adapter, SGE_STAT_CFG_A,
+                            STATSOURCE_T5_V(7) | STATMODE_V(0));
+
        for_each_port(adapter, i) {
                struct net_device *netdev;