diff options
Diffstat (limited to 'drivers/net/ethernet/ti/cpsw.c')
| -rw-r--r-- | drivers/net/ethernet/ti/cpsw.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 3772804fb69..b35e6a76664 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -374,6 +374,9 @@ void cpsw_tx_handler(void *token, int len, int status) struct net_device *ndev = skb->dev; struct cpsw_priv *priv = netdev_priv(ndev); + /* Check whether the queue is stopped due to stalled tx dma, if the + * queue is stopped then start the queue as we have free desc for tx + */ if (unlikely(netif_queue_stopped(ndev))) netif_start_queue(ndev); cpts_tx_timestamp(&priv->cpts, skb); @@ -736,6 +739,12 @@ static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb, goto fail; } + /* If there is no more tx desc left free then we need to + * tell the kernel to stop sending us tx frames. + */ + if (unlikely(cpdma_check_free_tx_desc(priv->txch))) + netif_stop_queue(ndev); + return NETDEV_TX_OK; fail: priv->stats.tx_dropped++; |