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net: bcmgenet: connect and disconnect from the PHY state machine

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phy_disconnect() is the only way to guarantee that we are not going to
schedule more work on the PHY state machine workqueue for that
particular PHY device.

This fixes an issue where a network interface was suspended prior to a
system suspend/resume cycle and would then be resumed as part of
mdio_bus_resume(), since the GENET interface clocks would have been
disabled, this basically resulted in bus errors to appear since we are
invoking the GENET driver adjust_link() callback.

Fixes: b6e978e504 ("net: bcmgenet: add suspend/resume callbacks")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2014-11-10 18:06:20 -08:00 committed by David S. Miller
parent 93ecd2607f
commit c96e731c93
3 changed files with 8 additions and 1 deletions
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6
drivers/net/ethernet/broadcom/genet/bcmgenet.c
View File

@ -2140,6 +2140,9 @@ static int bcmgenet_open(struct net_device *dev)
goto err_irq0;
}
phy_connect_direct(dev, priv->phydev, bcmgenet_mii_setup,
priv->phy_interface);
bcmgenet_netif_start(dev);
return 0;
@ -2184,6 +2187,9 @@ static int bcmgenet_close(struct net_device *dev)
bcmgenet_netif_stop(dev);
/* Really kill the PHY state machine and disconnect from it */
phy_disconnect(priv->phydev);
/* Disable MAC receive */
umac_enable_set(priv, CMD_RX_EN, false);

1
drivers/net/ethernet/broadcom/genet/bcmgenet.h
View File

@ -620,6 +620,7 @@ int bcmgenet_mii_init(struct net_device *dev);
int bcmgenet_mii_config(struct net_device *dev);
void bcmgenet_mii_exit(struct net_device *dev);
void bcmgenet_mii_reset(struct net_device *dev);
void bcmgenet_mii_setup(struct net_device *dev);
/* Wake-on-LAN routines */
void bcmgenet_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol);

2
drivers/net/ethernet/broadcom/genet/bcmmii.c
View File

@ -77,7 +77,7 @@ static int bcmgenet_mii_write(struct mii_bus *bus, int phy_id,
/* setup netdev link state when PHY link status change and
* update UMAC and RGMII block when link up
*/
static void bcmgenet_mii_setup(struct net_device *dev)
void bcmgenet_mii_setup(struct net_device *dev)
{
struct bcmgenet_priv *priv = netdev_priv(dev);
struct phy_device *phydev = priv->phydev;