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tlan: Add PHY reset timeout 

Add a timeout to prevent infinite loop waiting for PHY to reset.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ondrej Zary 2014-06-30 18:38:34 +02:00 committed by David S. Miller
parent 278e48b0c4
commit 9cff441ed6
1 changed files with 7 additions and 2 deletions
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9
drivers/net/ethernet/ti/tlan.c
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@ -2568,6 +2568,7 @@ static void tlan_phy_reset(struct net_device *dev)
struct tlan_priv *priv = netdev_priv(dev);
u16 phy;
u16 value;
unsigned long timeout = jiffies + HZ;
phy = priv->phy[priv->phy_num];
@ -2575,9 +2576,13 @@ static void tlan_phy_reset(struct net_device *dev)
tlan_mii_sync(dev->base_addr);
value = MII_GC_LOOPBK | MII_GC_RESET;
tlan_mii_write_reg(dev, phy, MII_GEN_CTL, value);
do {
tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &value);
while (value & MII_GC_RESET)
tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &value);
if (time_after(jiffies, timeout)) {
netdev_err(dev, "PHY reset timeout\n");
return;
}
} while (value & MII_GC_RESET);
/* Wait for 500 ms and initialize.
* I don't remember why I wait this long.