ucc_geth: Do not bring the whole IF down when TX failure.

ucc_geth_close lacks a cancel_work_sync(&ugeth->timeout_work)
to stop any outstanding processing of TX fail. However, one
can not call cancel_work_sync without fixing the timeout function
otherwise it will deadlock. This patch brings ucc_geth in line with
gianfar:

Don't bring the interface down and up, just reinit controller HW
and PHY.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Reviewed-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ucc_geth.c b/drivers/net/ucc_geth.c
index a4c3f5708246e9038ac716c4b8e9b7b06abeb28e..cf6653f71d232847298598b49e0c83711aca9ede 100644 (file)
--- a/drivers/net/ucc_geth.c
+++ b/drivers/net/ucc_geth.c
@@ -2065,9 +2065,6 @@ static void ucc_geth_stop(struct ucc_geth_private *ugeth)
        /* Disable Rx and Tx */
        clrbits32(&ug_regs->maccfg1, MACCFG1_ENABLE_RX | MACCFG1_ENABLE_TX);
 
-       phy_disconnect(ugeth->phydev);
-       ugeth->phydev = NULL;
-
        ucc_geth_memclean(ugeth);
 }
 
@@ -3550,7 +3547,10 @@ static int ucc_geth_close(struct net_device *dev)
 
        napi_disable(&ugeth->napi);
 
+       cancel_work_sync(&ugeth->timeout_work);
        ucc_geth_stop(ugeth);
+       phy_disconnect(ugeth->phydev);
+       ugeth->phydev = NULL;
 
        free_irq(ugeth->ug_info->uf_info.irq, ugeth->ndev);
 
@@ -3579,8 +3579,12 @@ static void ucc_geth_timeout_work(struct work_struct *work)
                 * Must reset MAC *and* PHY. This is done by reopening
                 * the device.
                 */
-               ucc_geth_close(dev);
-               ucc_geth_open(dev);
+               netif_tx_stop_all_queues(dev);
+               ucc_geth_stop(ugeth);
+               ucc_geth_init_mac(ugeth);
+               /* Must start PHY here */
+               phy_start(ugeth->phydev);
+               netif_tx_start_all_queues(dev);
        }
 
        netif_tx_schedule_all(dev);
@@ -3594,7 +3598,6 @@ static void ucc_geth_timeout(struct net_device *dev)
 {
        struct ucc_geth_private *ugeth = netdev_priv(dev);
 
-       netif_carrier_off(dev);
        schedule_work(&ugeth->timeout_work);
 }