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drivers: net: cpsw: ndev: fix accessing to suspended device

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The CPSW might be suspended by RPM if all ethX interfaces are down,
but it still could be accesible through net_device_ops interfce. In
this case net_device_ops operations requiring registers access will
cause L3 errors and CPSW crash.

Hence, fix it by adding RPM get/put calls in net_device_ops callbacks
which need to access CPSW registers: .ndo_set_mac_address(),
.ndo_vlan_rx_add_vid(), .ndo_vlan_rx_kill_vid().

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Grygorii Strashko 2016-06-24 21:23:45 +03:00 committed by David S. Miller
parent 7898b1daf0
commit a6c5d14f51
1 changed files with 30 additions and 3 deletions
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33
drivers/net/ethernet/ti/cpsw.c
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@ -1614,10 +1614,17 @@ static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
struct sockaddr *addr = (struct sockaddr *)p;
int flags = 0;
u16 vid = 0;
int ret;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
ret = pm_runtime_get_sync(&priv->pdev->dev);
if (ret < 0) {
pm_runtime_put_noidle(&priv->pdev->dev);
return ret;
}
if (priv->data.dual_emac) {
vid = priv->slaves[priv->emac_port].port_vlan;
flags = ALE_VLAN;
@ -1632,6 +1639,8 @@ static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
for_each_slave(priv, cpsw_set_slave_mac, priv);
pm_runtime_put(&priv->pdev->dev);
return 0;
}
@ -1696,10 +1705,17 @@ static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
__be16 proto, u16 vid)
{
struct cpsw_priv *priv = netdev_priv(ndev);
int ret;
if (vid == priv->data.default_vlan)
return 0;
ret = pm_runtime_get_sync(&priv->pdev->dev);
if (ret < 0) {
pm_runtime_put_noidle(&priv->pdev->dev);
return ret;
}
if (priv->data.dual_emac) {
/* In dual EMAC, reserved VLAN id should not be used for
* creating VLAN interfaces as this can break the dual
@ -1714,7 +1730,10 @@ static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
}
dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
return cpsw_add_vlan_ale_entry(priv, vid);
ret = cpsw_add_vlan_ale_entry(priv, vid);
pm_runtime_put(&priv->pdev->dev);
return ret;
}
static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
@ -1726,6 +1745,12 @@ static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
if (vid == priv->data.default_vlan)
return 0;
ret = pm_runtime_get_sync(&priv->pdev->dev);
if (ret < 0) {
pm_runtime_put_noidle(&priv->pdev->dev);
return ret;
}
if (priv->data.dual_emac) {
int i;
@ -1745,8 +1770,10 @@ static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
if (ret != 0)
return ret;
return cpsw_ale_del_mcast(priv->ale, priv->ndev->broadcast,
0, ALE_VLAN, vid);
ret = cpsw_ale_del_mcast(priv->ale, priv->ndev->broadcast,
0, ALE_VLAN, vid);
pm_runtime_put(&priv->pdev->dev);
return ret;
}
static const struct net_device_ops cpsw_netdev_ops = {