diff options
| author | Grygorii Strashko <grygorii.strashko@ti.com> | 2016-06-24 21:23:45 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-28 15:57:18 +0300 |
| commit | a6c5d14f5136e4919ace42bdbf392d2f6e68d4da (patch) | |
| tree | 25210124c951e353ab005c0607d5a659b7a1b6f8 | |
| parent | 7898b1daf055537a8f661828272defecdee49f27 (diff) | |
| download | linux-a6c5d14f5136e4919ace42bdbf392d2f6e68d4da.tar.xz | |
drivers: net: cpsw: ndev: fix accessing to suspended device
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>
| -rw-r--r-- | drivers/net/ethernet/ti/cpsw.c | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 2b21cad55ae2..6d0c5a0c34c6 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -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 = { |