tg3: restore rx_dropped accounting

commit 511d22247be7 (tg3: 64 bit stats on all arches), overlooked the
rx_dropped accounting.

We use a full "struct rtnl_link_stats64" to hold rx_dropped value, but
forgot to report it in tg3_get_stats64().

Use an "unsigned long" instead to shrink "struct tg3" by 176 bytes, and
report this value to stats readers.

Increment rx_dropped counter for oversized frames.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Michael Chan <mchan@broadcom.com>
CC: Matt Carlson <mcarlson@broadcom.com>
Acked-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 5 insertions, 3 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index bc3af78a869f..1ec4b9e0239a 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -4666,7 +4666,7 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
                                        desc_idx, *post_ptr);
                 drop_it_no_recycle:
                         /* Other statistics kept track of by card. */
-                        tp->net_stats.rx_dropped++;
+                        tp->rx_dropped++;
                         goto next_pkt;
                 }
 
@@ -4726,7 +4726,7 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
                 if (len > (tp->dev->mtu + ETH_HLEN) &&
                     skb->protocol != htons(ETH_P_8021Q)) {
                         dev_kfree_skb(skb);
-                        goto next_pkt;
+                        goto drop_it_no_recycle;
                 }
 
                 if (desc->type_flags & RXD_FLAG_VLAN &&
@@ -9240,6 +9240,8 @@ static struct rtnl_link_stats64 *tg3_get_stats64(struct net_device *dev,
         stats->rx_missed_errors = old_stats->rx_missed_errors +
                 get_stat64(&hw_stats->rx_discards);
 
+        stats->rx_dropped = tp->rx_dropped;
+
         return stats;
 }
 
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 4937bd190964..be7ff138a7f9 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2759,7 +2759,7 @@ struct tg3 {
 
 
         /* begin "everything else" cacheline(s) section */
-        struct rtnl_link_stats64        net_stats;
+        unsigned long                   rx_dropped;
         struct rtnl_link_stats64        net_stats_prev;
         struct tg3_ethtool_stats        estats;
         struct tg3_ethtool_stats        estats_prev;