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sunvnet: fix rx packet length check to allow for TSO

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This patch fixes the rx packet length check in the sunvnet driver to allow
for a TSO max packet length greater than the LDC channel negotiated MTU.
These are negotiated separately and there is no requirement that
port->tsolen be less than port->rmtu, but if it isn't, it'll drop packets
with rx length errors.

Signed-off-by: David L Stevens <david.stevens@oracle.com>
Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David L Stevens 2015-01-13 12:45:05 -05:00 committed by David S. Miller
parent 3e7a8716e2
commit 86cfeab6b5
1 changed files with 6 additions and 1 deletions
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7
drivers/net/ethernet/sun/sunvnet.c
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@ -351,10 +351,15 @@ static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc)
unsigned int len = desc->size;
unsigned int copy_len;
struct sk_buff *skb;
int maxlen;
int err;
err = -EMSGSIZE;
if (unlikely(len < ETH_ZLEN || len > port->rmtu)) {
if (port->tso && port->tsolen > port->rmtu)
maxlen = port->tsolen;
else
maxlen = port->rmtu;
if (unlikely(len < ETH_ZLEN || len > maxlen)) {
dev->stats.rx_length_errors++;
goto out_dropped;
}