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>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 592a4d66169c..f5dcde27e402 100644
--- 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;