diff options
author | hayeswang <hayeswang@realtek.com> | 2013-11-20 17:30:55 +0800 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2013-11-20 15:09:41 -0500 |
commit | 61598788582cafad52816d5d1db879334d8bd561 (patch) | |
tree | 241c6444ab2a86e87d6c483266d7a627c30fcf18 /drivers/net/usb | |
parent | 7937f9e5141c9d4864d399d91325605a35cd5831 (diff) | |
download | op-kernel-dev-61598788582cafad52816d5d1db879334d8bd561.zip op-kernel-dev-61598788582cafad52816d5d1db879334d8bd561.tar.gz |
r8152: modify the tx flow
Remove the code for sending the packet in the rtl8152_start_xmit().
Let rtl8152_start_xmit() to queue the packet only, and schedule a
tasklet to send the queued packets. This simplify the code and make
sure all the packet would be sent by the original order.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb')
-rw-r--r-- | drivers/net/usb/r8152.c | 46 |
1 files changed, 3 insertions, 43 deletions
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 428600d..8a786b6 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -1388,53 +1388,13 @@ static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb, struct net_device *netdev) { struct r8152 *tp = netdev_priv(netdev); - struct net_device_stats *stats = rtl8152_get_stats(netdev); - unsigned long flags; - struct tx_agg *agg = NULL; - struct tx_desc *tx_desc; - unsigned int len; - u8 *tx_data; - int res; skb_tx_timestamp(skb); - /* If tx_queue is not empty, it means at least one previous packt */ - /* is waiting for sending. Don't send current one before it. */ - if (skb_queue_empty(&tp->tx_queue)) - agg = r8152_get_tx_agg(tp); - - if (!agg) { - skb_queue_tail(&tp->tx_queue, skb); - return NETDEV_TX_OK; - } - - tx_desc = (struct tx_desc *)agg->head; - tx_data = agg->head + sizeof(*tx_desc); - agg->skb_num = agg->skb_len = 0; + skb_queue_tail(&tp->tx_queue, skb); - len = skb->len; - r8152_tx_csum(tp, tx_desc, skb); - memcpy(tx_data, skb->data, len); - dev_kfree_skb_any(skb); - agg->skb_num++; - agg->skb_len += len; - usb_fill_bulk_urb(agg->urb, tp->udev, usb_sndbulkpipe(tp->udev, 2), - agg->head, len + sizeof(*tx_desc), - (usb_complete_t)write_bulk_callback, agg); - res = usb_submit_urb(agg->urb, GFP_ATOMIC); - if (res) { - /* Can we get/handle EPIPE here? */ - if (res == -ENODEV) { - netif_device_detach(tp->netdev); - } else { - netif_warn(tp, tx_err, netdev, - "failed tx_urb %d\n", res); - stats->tx_dropped++; - spin_lock_irqsave(&tp->tx_lock, flags); - list_add_tail(&agg->list, &tp->tx_free); - spin_unlock_irqrestore(&tp->tx_lock, flags); - } - } + if (!list_empty(&tp->tx_free)) + tasklet_schedule(&tp->tl); return NETDEV_TX_OK; } |