net: bcmgenet: rework bcmgenet_netif_start and bcmgenet_netif_stop

This commit consolidates more common functionality from
bcmgenet_close and bcmgenet_suspend into bcmgenet_netif_stop and
modifies the start and stop sequences to better suit the design
of the GENET hardware.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 88aacf3..7472247 100644 (file)
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -2763,11 +2763,11 @@ static void bcmgenet_netif_start(struct net_device *dev)
 
        /* Start the network engine */
        bcmgenet_enable_rx_napi(priv);
-       bcmgenet_enable_tx_napi(priv);
 
        umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, true);
 
        netif_tx_start_all_queues(dev);
+       bcmgenet_enable_tx_napi(priv);
 
        /* Monitor link interrupts now */
        bcmgenet_link_intr_enable(priv);
@@ -2868,10 +2868,19 @@ static void bcmgenet_netif_stop(struct net_device *dev)
 {
        struct bcmgenet_priv *priv = netdev_priv(dev);
 
+       bcmgenet_disable_tx_napi(priv);
        netif_tx_stop_all_queues(dev);
+
+       /* Disable MAC receive */
+       umac_enable_set(priv, CMD_RX_EN, false);
+
+       bcmgenet_dma_teardown(priv);
+
+       /* Disable MAC transmit. TX DMA disabled must be done before this */
+       umac_enable_set(priv, CMD_TX_EN, false);
+
        phy_stop(priv->phydev);
        bcmgenet_disable_rx_napi(priv);
-       bcmgenet_disable_tx_napi(priv);
        bcmgenet_intr_disable(priv);
 
        /* Wait for pending work items to complete. Since interrupts are
@@ -2883,12 +2892,16 @@ static void bcmgenet_netif_stop(struct net_device *dev)
        priv->old_speed = -1;
        priv->old_duplex = -1;
        priv->old_pause = -1;
+
+       /* tx reclaim */
+       bcmgenet_tx_reclaim_all(dev);
+       bcmgenet_fini_dma(priv);
 }
 
 static int bcmgenet_close(struct net_device *dev)
 {
        struct bcmgenet_priv *priv = netdev_priv(dev);
-       int ret;
+       int ret = 0;
 
        netif_dbg(priv, ifdown, dev, "bcmgenet_close\n");
 
@@ -2897,20 +2910,6 @@ static int bcmgenet_close(struct net_device *dev)
        /* Really kill the PHY state machine and disconnect from it */
        phy_disconnect(priv->phydev);
 
-       /* Disable MAC receive */
-       umac_enable_set(priv, CMD_RX_EN, false);
-
-       ret = bcmgenet_dma_teardown(priv);
-       if (ret)
-               return ret;
-
-       /* Disable MAC transmit. TX DMA disabled must be done before this */
-       umac_enable_set(priv, CMD_TX_EN, false);
-
-       /* tx reclaim */
-       bcmgenet_tx_reclaim_all(dev);
-       bcmgenet_fini_dma(priv);
-
        free_irq(priv->irq0, priv);
        free_irq(priv->irq1, priv);
 
@@ -3522,7 +3521,7 @@ static int bcmgenet_suspend(struct device *d)
 {
        struct net_device *dev = dev_get_drvdata(d);
        struct bcmgenet_priv *priv = netdev_priv(dev);
-       int ret;
+       int ret = 0;
 
        if (!netif_running(dev))
                return 0;
@@ -3534,20 +3533,6 @@ static int bcmgenet_suspend(struct device *d)
 
        netif_device_detach(dev);
 
-       /* Disable MAC receive */
-       umac_enable_set(priv, CMD_RX_EN, false);
-
-       ret = bcmgenet_dma_teardown(priv);
-       if (ret)
-               return ret;
-
-       /* Disable MAC transmit. TX DMA disabled must be done before this */
-       umac_enable_set(priv, CMD_TX_EN, false);
-
-       /* tx reclaim */
-       bcmgenet_tx_reclaim_all(dev);
-       bcmgenet_fini_dma(priv);
-
        /* Prepare the device for Wake-on-LAN and switch to the slow clock */
        if (device_may_wakeup(d) && priv->wolopts) {
                ret = bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC);