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sunvnet: only use connected ports when sending 

The sunvnet driver doesn't check whether or not a port is connected when
transmitting packets, which results in failures if a port fails to connect
(e.g., due to a version mismatch). The original code also assumes
unnecessarily that the first port is up and a switch, even though there is
a flag for switch ports.

This patch only matches a port if it is connected, and otherwise uses the
switch_port flag to send the packet to a switch port that is up.

Signed-off-by: David L Stevens <david.stevens@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
David L Stevens 2014-07-25 10:30:11 -04:00 committed by David S. Miller
parent 8356f97689
commit 8266f5fcf0
1 changed files with 17 additions and 5 deletions
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22
drivers/net/ethernet/sun/sunvnet.c
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@ -610,6 +610,13 @@ static int __vnet_tx_trigger(struct vnet_port *port)
return err;
}
static inline bool port_is_up(struct vnet_port *vnet)
{
struct vio_driver_state *vio = &vnet->vio;
return !!(vio->hs_state & VIO_HS_COMPLETE);
}
struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
{
unsigned int hash = vnet_hashfn(skb->data);
@ -617,14 +624,19 @@ struct vnet_port *__tx_port_find(struct vnet *vp, struct sk_buff *skb)
struct vnet_port *port;
hlist_for_each_entry(port, hp, hash) {
if (!port_is_up(port))
continue;
if (ether_addr_equal(port->raddr, skb->data))
return port;
}
port = NULL;
if (!list_empty(&vp->port_list))
port = list_entry(vp->port_list.next, struct vnet_port, list);
return port;
list_for_each_entry(port, &vp->port_list, list) {
if (!port->switch_port)
continue;
if (!port_is_up(port))
continue;
return port;
}
return NULL;
}
struct vnet_port *tx_port_find(struct vnet *vp, struct sk_buff *skb)