e1000e: separate out PHY statistics register updates

The 82577/82578 parts have half-duplex statistics in PHY registers.  These
need only be read when in half-duplex and should all be read at once rather
than one at a time to prevent excessive cycles of acquiring/releasing the
PHY semaphore.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index 5d8fad3bb203..70cd681fd1ce 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -3503,6 +3503,7 @@ struct e1000_info e1000_pch_info = {
                                   | FLAG_HAS_JUMBO_FRAMES
                                   | FLAG_DISABLE_FC_PAUSE_TIME /* errata */
                                   | FLAG_APME_IN_WUC,
+        .flags2                 = FLAG2_HAS_PHY_STATS,
         .pba                    = 26,
         .max_hw_frame_size      = 4096,
         .get_variants           = e1000_get_variants_ich8lan,