[PATCH 08/11] tlan: Add PHY reset timeout
From: Ondrej Zary <hidden>
Date: 2014-06-30 16:38:58
Also in:
lkml
Subsystem:
networking drivers, the rest, tlan network driver · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Samuel Chessman
Add a timeout to prevent infinite loop waiting for PHY to reset. Signed-off-by: Ondrej Zary <redacted> --- drivers/net/ethernet/ti/tlan.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/ti/tlan.c b/drivers/net/ethernet/ti/tlan.c
index 3e6a80b..1f878b9 100644
--- a/drivers/net/ethernet/ti/tlan.c
+++ b/drivers/net/ethernet/ti/tlan.c@@ -2569,6 +2569,7 @@ 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];
@@ -2576,9 +2577,13 @@ 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); - tlan_mii_read_reg(dev, phy, MII_GEN_CTL, &value); - while (value & MII_GC_RESET) + do { 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.
--
Ondrej Zary