sc92031: start transmit return value bugfix
Any negative return value from start_xmit is interpreted as NETDEV_TX_LOCK
which is not what this driver wants. It should return 0 (NETDEV_TX_OK)
when it consumes a packet.
Also, use skb_padto() as the generic way to pad small frames.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/sc92031.c b/drivers/net/sc92031.c
index af0422d..841bfa7 100644
--- a/drivers/net/sc92031.c
+++ b/drivers/net/sc92031.c
@@ -947,16 +947,16 @@
static int sc92031_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
- int err = 0;
struct sc92031_priv *priv = netdev_priv(dev);
void __iomem *port_base = priv->port_base;
-
unsigned len;
unsigned entry;
u32 tx_status;
+ if (skb_padto(skb, ETH_ZLEN))
+ return NETDEV_TX_OK;
+
if (unlikely(skb->len > TX_BUF_SIZE)) {
- err = -EMSGSIZE;
dev->stats.tx_dropped++;
goto out;
}
@@ -964,7 +964,6 @@
spin_lock(&priv->lock);
if (unlikely(!netif_carrier_ok(dev))) {
- err = -ENOLINK;
dev->stats.tx_dropped++;
goto out_unlock;
}
@@ -976,11 +975,6 @@
skb_copy_and_csum_dev(skb, priv->tx_bufs + entry * TX_BUF_SIZE);
len = skb->len;
- if (unlikely(len < ETH_ZLEN)) {
- memset(priv->tx_bufs + entry * TX_BUF_SIZE + len,
- 0, ETH_ZLEN - len);
- len = ETH_ZLEN;
- }
wmb();
@@ -1007,7 +1001,7 @@
out:
dev_kfree_skb(skb);
- return err;
+ return NETDEV_TX_OK;
}
static int sc92031_open(struct net_device *dev)