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via-rhine: dma_wmb transmit barrier. 

Follow the now usual transmit descriptor update path:
1. content change
2. dma_wmb
3. ownership change

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
françois romieu 2015-05-01 22:14:44 +02:00 committed by David S. Miller
parent 810f19bcb8
commit e1efa87241
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/via/via-rhine.c
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@ -1849,7 +1849,7 @@ static netdev_tx_t rhine_start_tx(struct sk_buff *skb,
netdev_sent_queue(dev, skb->len); netdev_sent_queue(dev, skb->len);
/* lock eth irq */ /* lock eth irq */
wmb(); dma_wmb();
rp->tx_ring[entry].tx_status |= cpu_to_le32(DescOwn); rp->tx_ring[entry].tx_status |= cpu_to_le32(DescOwn);
wmb(); wmb();