igb: make use of the uta to allow for promiscous mode filter

In order to support functions such as vlan tag stripping when SR-IOV is
enabled any given packet must match at least one filter.  However in the
case of promiscous mode being enabled on the PF the traffic routed to it
may not match any filters and is just sent to the PF by default.  In order
to make certain that this traffic is processed we can set all bits in the
UTA registers to create a pseudo promiscous mode filter that accepts all
packets.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/igb/e1000_82575.c b/drivers/net/igb/e1000_82575.c
index 78971815bbce..b8a88a8b393f 100644
--- a/drivers/net/igb/e1000_82575.c
+++ b/drivers/net/igb/e1000_82575.c
@@ -875,6 +875,11 @@ static s32 igb_init_hw_82575(struct e1000_hw *hw)
         for (i = 0; i < mac->mta_reg_count; i++)
                 array_wr32(E1000_MTA, i, 0);
 
+        /* Zero out the Unicast HASH table */
+        hw_dbg("Zeroing the UTA\n");
+        for (i = 0; i < mac->uta_reg_count; i++)
+                array_wr32(E1000_UTA, i, 0);
+
         /* Setup link and flow control */
         ret_val = igb_setup_link(hw);