[PATCH net v2 4/4] net: macb: increment stats.tx_dropped on DMA map error

[Théo Lebrun]

On .ndo_start_xmit() and DMA mapping failure, increment the Tx dropped
statistics counter by one.

Fixes: 89e5785fc8a6 ("[PATCH] Atmel MACB ethernet driver")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Théo Lebrun <theo.lebrun@xxxxxxxxxxx>
---
 drivers/net/ethernet/cadence/macb_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index ba7cbb10dc2c..353b4bd61aae 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -2567,6 +2567,8 @@ static netdev_tx_t macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	/* Map socket buffer for DMA transfer */
 	if (macb_tx_map(bp, queue, skb, hdrlen)) {
 		dev_kfree_skb_any(skb);
+		queue->stats.tx_dropped++;
+		bp->dev->stats.tx_dropped++;
 		goto unlock;
 	}
 

-- 
2.54.0