igb: only read phy specific stats if in internal phy mode
There are a couple statistics registers that are not meant to
be read when in SGMII/serdes mode. This patch adds a check to
verify mode before reading and updating these statistics.
Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index b989b34..cba0115 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -3975,7 +3975,7 @@
struct net_device_stats *net_stats = igb_get_stats(adapter->netdev);
struct e1000_hw *hw = &adapter->hw;
struct pci_dev *pdev = adapter->pdev;
- u32 rnbc;
+ u32 rnbc, reg;
u16 phy_tmp;
int i;
u64 bytes, packets;
@@ -4072,8 +4072,13 @@
adapter->stats.colc += rd32(E1000_COLC);
adapter->stats.algnerrc += rd32(E1000_ALGNERRC);
- adapter->stats.rxerrc += rd32(E1000_RXERRC);
- adapter->stats.tncrs += rd32(E1000_TNCRS);
+ /* read internal phy specific stats */
+ reg = rd32(E1000_CTRL_EXT);
+ if (!(reg & E1000_CTRL_EXT_LINK_MODE_MASK)) {
+ adapter->stats.rxerrc += rd32(E1000_RXERRC);
+ adapter->stats.tncrs += rd32(E1000_TNCRS);
+ }
+
adapter->stats.tsctc += rd32(E1000_TSCTC);
adapter->stats.tsctfc += rd32(E1000_TSCTFC);