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net: bcmgenet: decouple flow control from bcmgenet_tx_reclaim 

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: 1c1008c793 ("net: bcmgenet: add main driver file")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Doug Berger 2017-03-09 16:58:50 -08:00 committed by David S. Miller
parent 89316fa34a
commit 6d22fe1400
1 changed files with 11 additions and 9 deletions
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20
drivers/net/ethernet/broadcom/genet/bcmgenet.c
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@ -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);