e1000: omit stats for broken counter in 82543

The 82543 chip does not count tx_carrier_errors properly in FD mode;
report zeros instead of garbage.

Originally from Jesse Brandeburg <jesse.brandeburg@intel.com>, rewritten
to use feature flags by me.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/e1000/e1000_hw.c b/drivers/net/e1000/e1000_hw.c
index 0201ca548cd1..ce82eb52ea95 100644
--- a/drivers/net/e1000/e1000_hw.c
+++ b/drivers/net/e1000/e1000_hw.c
@@ -442,6 +442,12 @@ e1000_set_mac_type(struct e1000_hw *hw)
                 break;
         }
 
+        /* The 82543 chip does not count tx_carrier_errors properly in
+         * FD mode
+         */
+        if (hw->mac_type == e1000_82543)
+                hw->bad_tx_carr_stats_fd = TRUE;
+
         return E1000_SUCCESS;
 }