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drivers: net: cpsw: fix cpsw hung with add vlan using vconfig

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while adding vlan in dual EMAC mode, only specific ports should be
subscribed for the vlan, else it will lead to switching mode and
if both ports connected to same switch cpsw will hung as it creates
a network loop. Fixing this by adding only specific ports in case
of dual EMAC.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mugunthan V N 2015-01-15 14:59:28 +05:30 committed by David S. Miller
parent 16dde0d6ac
commit 9f6bd8fa58
1 changed files with 17 additions and 10 deletions
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27
drivers/net/ethernet/ti/cpsw.c
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@ -1634,16 +1634,24 @@ static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
unsigned short vid)
{
int ret;
int unreg_mcast_mask;
int unreg_mcast_mask = 0;
u32 port_mask;
if (priv->ndev->flags & IFF_ALLMULTI)
unreg_mcast_mask = ALE_ALL_PORTS;
else
unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
if (priv->data.dual_emac) {
port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST;
ret = cpsw_ale_add_vlan(priv->ale, vid,
ALE_ALL_PORTS << priv->host_port,
0, ALE_ALL_PORTS << priv->host_port,
if (priv->ndev->flags & IFF_ALLMULTI)
unreg_mcast_mask = port_mask;
} else {
port_mask = ALE_ALL_PORTS;
if (priv->ndev->flags & IFF_ALLMULTI)
unreg_mcast_mask = ALE_ALL_PORTS;
else
unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
}
ret = cpsw_ale_add_vlan(priv->ale, vid, port_mask, 0, port_mask,
unreg_mcast_mask << priv->host_port);
if (ret != 0)
return ret;
@ -1654,8 +1662,7 @@ static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
goto clean_vid;
ret = cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
ALE_ALL_PORTS << priv->host_port,
ALE_VLAN, vid, 0);
port_mask, ALE_VLAN, vid, 0);
if (ret != 0)
goto clean_vlan_ucast;
return 0;