diff mbox

[v2,net,8/8] net: bcmgenet: decouple flow control from bcmgenet_tx_reclaim

Message ID 20170310005850.10808-9-opendmb@gmail.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Doug Berger March 10, 2017, 12:58 a.m. UTC 
The bcmgenet_tx_reclaim() function is used to reclaim transmit
resources in different places within the driver.  Most of them
should not affect the state of the transmit flow control.

This commit relocates the logic for waking tx queues based on
freed resources to the napi polling function where it is more
appropriate.

Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file")
Signed-off-by: Doug Berger <opendmb@gmail.com>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

Comments

Florian Fainelli March 10, 2017, 1:45 a.m. UTC | #1 
On 03/09/2017 04:58 PM, Doug Berger wrote:
> The bcmgenet_tx_reclaim() function is used to reclaim transmit
> resources in different places within the driver.  Most of them
> should not affect the state of the transmit flow control.
> 
> This commit relocates the logic for waking tx queues based on
> freed resources to the napi polling function where it is more
> appropriate.
> 
> Fixes: 1c1008c793fa ("net: bcmgenet: add main driver file")
> Signed-off-by: Doug Berger <opendmb@gmail.com>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
diff mbox

Patch

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index ec1f3014e410..69015fa50f20 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1234,7 +1234,6 @@  static unsigned int __bcmgenet_tx_reclaim(struct net_device *dev,
 	struct bcmgenet_priv *priv = netdev_priv(dev);
 	struct device *kdev = &priv->pdev->dev;
 	struct enet_cb *tx_cb_ptr;
-	struct netdev_queue *txq;
 	unsigned int pkts_compl = 0;
 	unsigned int bytes_compl = 0;
 	unsigned int c_index;
@@ -1286,13 +1285,8 @@  static unsigned int __bcmgenet_tx_reclaim(struct net_device *dev,
 	dev->stats.tx_packets += pkts_compl;
 	dev->stats.tx_bytes += bytes_compl;
 
-	txq = netdev_get_tx_queue(dev, ring->queue);
-	netdev_tx_completed_queue(txq, pkts_compl, bytes_compl);
-
-	if (ring->free_bds > (MAX_SKB_FRAGS + 1)) {
-		if (netif_tx_queue_stopped(txq))
-			netif_tx_wake_queue(txq);
-	}
+	netdev_tx_completed_queue(netdev_get_tx_queue(dev, ring->queue),
+				  pkts_compl, bytes_compl);
 
 	return pkts_compl;
 }
@@ -1315,8 +1309,16 @@  static int bcmgenet_tx_poll(struct napi_struct *napi, int budget)
 	struct bcmgenet_tx_ring *ring =
 		container_of(napi, struct bcmgenet_tx_ring, napi);
 	unsigned int work_done = 0;
+	struct netdev_queue *txq;
+	unsigned long flags;
 
-	work_done = bcmgenet_tx_reclaim(ring->priv->dev, ring);
+	spin_lock_irqsave(&ring->lock, flags);
+	work_done = __bcmgenet_tx_reclaim(ring->priv->dev, ring);
+	if (ring->free_bds > (MAX_SKB_FRAGS + 1)) {
+		txq = netdev_get_tx_queue(ring->priv->dev, ring->queue);
+		netif_tx_wake_queue(txq);
+	}
+	spin_unlock_irqrestore(&ring->lock, flags);
 
 	if (work_done == 0) {
 		napi_complete(napi);