net: fix network drivers ndo_start_xmit() return values (part 8)

net: fix network drivers ndo_start_xmit() return values (part 8)

[Patrick McHardy]

[-- Attachment #1: Type: text/plain, Size: 0 bytes --]



[-- Attachment #2: 08.diff --]
[-- Type: text/x-patch, Size: 1636 bytes --]

commit 6c6e6eb6ee2b7ab91c73e51a5d7a438d2daa5b94
Author: Patrick McHardy <kaber@trash.net>
Date:   Fri Jun 12 18:14:16 2009 +0200

    net: fix network drivers ndo_start_xmit() return values (part 8)
    
    Fix up USB drivers that return an errno value (result of usb_submit_urb())
    to qdisc_restart(), causing qdisc_restart() to print a warning and requeue/
    retransmit the skb.
    
    - hso: skb is freed: use after free
    - at76_usb: skb is freed: use after free
    
    Compile tested only.
    
    Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index e3580f4..f8c6d7e 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -816,7 +816,7 @@ static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
 	}
 	dev_kfree_skb(skb);
 	/* we're done */
-	return result;
+	return NETDEV_TX_OK;
 }
 
 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
diff --git a/drivers/staging/at76_usb/at76_usb.c b/drivers/staging/at76_usb/at76_usb.c
index c8af9a8..3f303ae 100644
--- a/drivers/staging/at76_usb/at76_usb.c
+++ b/drivers/staging/at76_usb/at76_usb.c
@@ -3242,12 +3242,11 @@ static int at76_tx(struct sk_buff *skb, struct net_device *netdev)
 			       "%s: -EINVAL: tx urb %p hcpriv %p complete %p\n",
 			       priv->netdev->name, priv->tx_urb,
 			       priv->tx_urb->hcpriv, priv->tx_urb->complete);
-	} else {
+	} else
 		stats->tx_bytes += skb->len;
-		dev_kfree_skb(skb);
-	}
 
-	return ret;
+	dev_kfree_skb(skb);
+	return NETDEV_TX_OK;
 }
 
 static void at76_tx_timeout(struct net_device *netdev)