From: Florian Fainelli <f.fainelli@gmail.com>
Date: Tue, 12 Jul 2016 23:04:36 +0000 (-0700)
Subject: net: ethoc: Correctly pad short packets
X-Git-Tag: v5.15~13260^2~20^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ee6c21b9c11ad96318160f9a504a3fac2114ddca;p=platform%2Fkernel%2Flinux-starfive.git

net: ethoc: Correctly pad short packets

Even though the hardware can be doing zero padding, we want the SKB to
be going out on the wire with the appropriate size. This fixes packet
truncations observed with e.g: ARP packets.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
index 06ae14a..4466a11 100644
--- a/drivers/net/ethernet/ethoc.c
+++ b/drivers/net/ethernet/ethoc.c
@@ -860,6 +860,11 @@ static netdev_tx_t ethoc_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	unsigned int entry;
 	void *dest;
 
+	if (skb_put_padto(skb, ETHOC_ZLEN)) {
+		dev->stats.tx_errors++;
+		goto out_no_free;
+	}
+
 	if (unlikely(skb->len > ETHOC_BUFSIZ)) {
 		dev->stats.tx_errors++;
 		goto out;
@@ -894,6 +899,7 @@ static netdev_tx_t ethoc_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	skb_tx_timestamp(skb);
 out:
 	dev_kfree_skb(skb);
+out_no_free:
 	return NETDEV_TX_OK;
 }