From f5a9ec20b3b2adf03a0b01902cda913b05abd382 Mon Sep 17 00:00:00 2001 From: Petri Gynther Date: Tue, 5 Apr 2016 13:59:59 -0700 Subject: [PATCH] net: bcmgenet: cleanup for bcmgenet_xmit() 1. Readability: Move nr_frags assignment a few lines down in order to bundle index -> ring -> txq calculations together. 2. Readability: Add parentheses around nr_frags + 1. 3. Minor fix: Stop the Tx queue and throw the error message only if the Tx queue hasn't already been stopped. Signed-off-by: Petri Gynther Acked-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/genet/bcmgenet.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index cf6445d148ca..7f85a8494eee 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -1447,15 +1447,19 @@ static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev) else index -= 1; - nr_frags = skb_shinfo(skb)->nr_frags; ring = &priv->tx_rings[index]; txq = netdev_get_tx_queue(dev, ring->queue); + nr_frags = skb_shinfo(skb)->nr_frags; + spin_lock_irqsave(&ring->lock, flags); - if (ring->free_bds <= nr_frags + 1) { - netif_tx_stop_queue(txq); - netdev_err(dev, "%s: tx ring %d full when queue %d awake\n", - __func__, index, ring->queue); + if (ring->free_bds <= (nr_frags + 1)) { + if (!netif_tx_queue_stopped(txq)) { + netif_tx_stop_queue(txq); + netdev_err(dev, + "%s: tx ring %d full when queue %d awake\n", + __func__, index, ring->queue); + } ret = NETDEV_TX_BUSY; goto out; } -- 2.20.1