diff options
Diffstat (limited to 'drivers/net/8139too.c')
| -rw-r--r-- | drivers/net/8139too.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/8139too.c b/drivers/net/8139too.c index 32e66f0d4344..0daf8c15e381 100644 --- a/drivers/net/8139too.c +++ b/drivers/net/8139too.c @@ -1723,13 +1723,18 @@ static int rtl8139_start_xmit (struct sk_buff *skb, struct net_device *dev) } spin_lock_irqsave(&tp->lock, flags); + /* + * Writing to TxStatus triggers a DMA transfer of the data + * copied to tp->tx_buf[entry] above. Use a memory barrier + * to make sure that the device sees the updated data. + */ + wmb(); RTL_W32_F (TxStatus0 + (entry * sizeof (u32)), tp->tx_flag | max(len, (unsigned int)ETH_ZLEN)); dev->trans_start = jiffies; tp->cur_tx++; - wmb(); if ((tp->cur_tx - NUM_TX_DESC) == tp->dirty_tx) netif_stop_queue (dev); |