net: bcmgenet: fix accounting of packet drops vs errors

bcmgenet driver needs to separate packet drops from packet errors.

When the driver has to drop a *good* packet, due to lack of buffers or
replacement skbs, increment only dev->stats.[rx|tx]_dropped.

When the driver encounters a bad Rx packet or Tx error, increment only
dev->stats.[rx|tx]_errors + relevant detailed error counter.

Signed-off-by: Petri Gynther <pgynther@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index b43b2cb..64c1e9d 100644 (file)
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1230,7 +1230,6 @@ static struct sk_buff *bcmgenet_put_tx_csum(struct net_device *dev,
                new_skb = skb_realloc_headroom(skb, sizeof(*status));
                dev_kfree_skb(skb);
                if (!new_skb) {
-                       dev->stats.tx_errors++;
                        dev->stats.tx_dropped++;
                        return NULL;
                }
@@ -1465,7 +1464,6 @@ static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
 
                if (unlikely(!skb)) {
                        dev->stats.rx_dropped++;
-                       dev->stats.rx_errors++;
                        goto next;
                }
 
@@ -1493,7 +1491,6 @@ static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
                if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) {
                        netif_err(priv, rx_status, dev,
                                  "dropping fragmented packet!\n");
-                       dev->stats.rx_dropped++;
                        dev->stats.rx_errors++;
                        dev_kfree_skb_any(skb);
                        goto next;
@@ -1515,7 +1512,6 @@ static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
                                dev->stats.rx_frame_errors++;
                        if (dma_flag & DMA_RX_LG)
                                dev->stats.rx_length_errors++;
-                       dev->stats.rx_dropped++;
                        dev->stats.rx_errors++;
                        dev_kfree_skb_any(skb);
                        goto next;