Re: [PATCH net-next 2/6] igb: Add double-check MTA_REGISTER for i210 and i211

[Nick Lowe <nick.lowe@gmail.com>]

Or better, make attempt increment instead of the original decrement:

+     int i;
+     int attempt;
+     for (i = hw->mac.mta_reg_count - 1; i >= 0; i--) {
+          for (attempt = 1; attempt <= 3; attempt++) {
+               if (array_rd32(E1000_MTA, i) != hw->mac.mta_shadow[i]) {
+                    array_wr32(E1000_MTA, i, hw->mac.mta_shadow[i]);
+                    wrfl();
+
+                    if (attempt == 3 && array_rd32(E1000_MTA, i) !=
hw->mac.mta_shadow[i]) {
+                         hw_dbg("Failed to update MTA_REGISTER %d,
too many retries\n", i);
+                    }
+               }
+          }
+     }