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amd-xgbe: Clear all state during a device restart

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When performing a device restart, like during an MTU change, sometimes
the device queues still have data and get hung up trying to flush
resulting in the device becoming unresponsive until brought down and
back up. To prevent this, always perform a device reset during a
restart.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lendacky, Thomas
2015-01-16 12:46:45 -06:00
committed by David S. Miller
parent 03e50fd7b1
commit 916102c666
3 changed files with 24 additions and 6 deletions
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11
drivers/net/ethernet/amd/xgbe/xgbe-drv.c
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@@ -927,7 +927,7 @@ static void xgbe_stop(struct xgbe_prv_data *pdata)
DBGPR("<--xgbe_stop\n");
}
static void xgbe_restart_dev(struct xgbe_prv_data *pdata, unsigned int reset)
static void xgbe_restart_dev(struct xgbe_prv_data *pdata)
{
struct xgbe_channel *channel;
struct xgbe_hw_if *hw_if = &pdata->hw_if;
@@ -950,9 +950,8 @@ static void xgbe_restart_dev(struct xgbe_prv_data *pdata, unsigned int reset)
xgbe_free_tx_data(pdata);
xgbe_free_rx_data(pdata);
/* Issue software reset to device if requested */
if (reset)
hw_if->exit(pdata);
/* Issue software reset to device */
hw_if->exit(pdata);
xgbe_start(pdata);
@@ -967,7 +966,7 @@ static void xgbe_restart(struct work_struct *work)
rtnl_lock();
xgbe_restart_dev(pdata, 1);
xgbe_restart_dev(pdata);
rtnl_unlock();
}
@@ -1587,7 +1586,7 @@ static int xgbe_change_mtu(struct net_device *netdev, int mtu)
pdata->rx_buf_size = ret;
netdev->mtu = mtu;
xgbe_restart_dev(pdata, 0);
xgbe_restart_dev(pdata);
DBGPR("<--xgbe_change_mtu\n");