net: fix network driver ndo_start_xmit() return values (part 1)
Fix up drivers that return an errno value to qdisc_restart(), causing
qdisc_restart() to print a warning and requeue/retransmit the skb.
- xpnet: memory allocation error, intention is to drop
- ethoc: oversized packet, packet must be dropped
- ibmlana: skb freed: use after free
- rrunner: skb freed: use after free
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c
index 6faefcf..8d1c60a 100644
--- a/drivers/misc/sgi-xp/xpnet.c
+++ b/drivers/misc/sgi-xp/xpnet.c
@@ -450,7 +450,8 @@
"packet\n", sizeof(struct xpnet_pending_msg));
dev->stats.tx_errors++;
- return -ENOMEM;
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
}
/* get the beginning of the first cacheline and end of last */
diff --git a/drivers/net/ethoc.c b/drivers/net/ethoc.c
index 91a9b1a..ceb6a9c 100644
--- a/drivers/net/ethoc.c
+++ b/drivers/net/ethoc.c
@@ -811,7 +811,7 @@
if (unlikely(skb->len > ETHOC_BUFSIZ)) {
priv->stats.tx_errors++;
- return -EMSGSIZE;
+ goto out;
}
entry = priv->cur_tx % priv->num_tx;
@@ -840,9 +840,9 @@
}
dev->trans_start = jiffies;
- dev_kfree_skb(skb);
-
spin_unlock_irq(&priv->lock);
+out:
+ dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
diff --git a/drivers/net/ibmlana.c b/drivers/net/ibmlana.c
index c25bc0b..448098d 100644
--- a/drivers/net/ibmlana.c
+++ b/drivers/net/ibmlana.c
@@ -815,7 +815,7 @@
static int ibmlana_tx(struct sk_buff *skb, struct net_device *dev)
{
ibmlana_priv *priv = netdev_priv(dev);
- int retval = 0, tmplen, addr;
+ int tmplen, addr;
unsigned long flags;
tda_t tda;
int baddr;
@@ -824,7 +824,6 @@
the upper layer is in deep desperation and we simply ignore the frame. */
if (priv->txusedcnt >= TXBUFCNT) {
- retval = -EIO;
dev->stats.tx_dropped++;
goto tx_done;
}
@@ -874,7 +873,7 @@
spin_unlock_irqrestore(&priv->lock, flags);
tx_done:
dev_kfree_skb(skb);
- return retval;
+ return NETDEV_TX_OK;
}
/* switch receiver mode. */
diff --git a/drivers/net/rrunner.c b/drivers/net/rrunner.c
index d890829..81dbcbb 100644
--- a/drivers/net/rrunner.c
+++ b/drivers/net/rrunner.c
@@ -1425,7 +1425,7 @@
if (!(new_skb = dev_alloc_skb(len + 8))) {
dev_kfree_skb(skb);
netif_wake_queue(dev);
- return -EBUSY;
+ return NETDEV_TX_OK;
}
skb_reserve(new_skb, 8);
skb_put(new_skb, len);