net: w5100: increase TX timeout period

This increases TX timeout period from one second to 5 seconds which is
the default value if the driver doesn't explicitly set
net_device->watchdog_timeo.

The one second timeout is too short for W5100 with SPI interface mode
which doesn't support burst READ/WRITE processing in the SPI transfer.
If the packet is transmitted while RX packets are being received at a
very high rate, the TX transmittion work in the workqueue is delayed
and the watchdog timer is expired.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Mike Sinkovsky <msink@permonline.ru>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/wiznet/w5100.c b/drivers/net/ethernet/wiznet/w5100.c
index 7c6d508..21bef2c 100644 (file)
--- a/drivers/net/ethernet/wiznet/w5100.c
+++ b/drivers/net/ethernet/wiznet/w5100.c
@@ -1142,7 +1142,6 @@ int w5100_probe(struct device *dev, const struct w5100_ops *ops,
 
        ndev->netdev_ops = &w5100_netdev_ops;
        ndev->ethtool_ops = &w5100_ethtool_ops;
-       ndev->watchdog_timeo = HZ;
        netif_napi_add(ndev, &priv->napi, w5100_napi_poll, 16);
 
        /* This chip doesn't support VLAN packets with normal MTU,