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r8152: adjust some duplicated code 

- Use r8152_get_tx_agg for getting tx agg list
- Replace submit rx with goto submit

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
hayeswang 2013-08-16 16:09:35 +08:00 committed by David S. Miller
parent a5a4f468e3
commit 0de98f6c6f
1 changed files with 28 additions and 27 deletions
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55
drivers/net/usb/r8152.c
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@ -1067,6 +1067,24 @@ static int alloc_all_mem(struct r8152 *tp)
return -ENOMEM;
}
static struct tx_agg *r8152_get_tx_agg(struct r8152 *tp)
{
struct tx_agg *agg = NULL;
unsigned long flags;
spin_lock_irqsave(&tp->tx_lock, flags);
if (!list_empty(&tp->tx_free)) {
struct list_head *cursor;
cursor = tp->tx_free.next;
list_del_init(cursor);
agg = list_entry(cursor, struct tx_agg, list);
}
spin_unlock_irqrestore(&tp->tx_lock, flags);
return agg;
}
static void
r8152_tx_csum(struct r8152 *tp, struct tx_desc *desc, struct sk_buff *skb)
{
@ -1139,15 +1157,8 @@ static void rx_bottom(struct r8152 *tp)
agg = list_entry(cursor, struct rx_agg, list);
urb = agg->urb;
if (urb->actual_length < ETH_ZLEN) {
ret = r8152_submit_rx(tp, agg, GFP_ATOMIC);
spin_lock_irqsave(&tp->rx_lock, flags);
if (ret && ret != -ENODEV) {
list_add_tail(&agg->list, next);
tasklet_schedule(&tp->tl);
}
continue;
}
if (urb->actual_length < ETH_ZLEN)
goto submit;
len_used = 0;
rx_desc = agg->head;
@ -1181,6 +1192,7 @@ static void rx_bottom(struct r8152 *tp)
len_used += sizeof(struct rx_desc) + pkt_len;
}
submit:
ret = r8152_submit_rx(tp, agg, GFP_ATOMIC);
spin_lock_irqsave(&tp->rx_lock, flags);
if (ret && ret != -ENODEV) {
@ -1205,16 +1217,10 @@ static void tx_bottom(struct r8152 *tp)
next_agg:
agg = NULL;
spin_lock_irqsave(&tp->tx_lock, flags);
if (!skb_queue_empty(&tp->tx_queue) && !list_empty(&tp->tx_free)) {
struct list_head *cursor;
cursor = tp->tx_free.next;
list_del_init(cursor);
agg = list_entry(cursor, struct tx_agg, list);
}
spin_unlock_irqrestore(&tp->tx_lock, flags);
if (skb_queue_empty(&tp->tx_queue))
return;
agg = r8152_get_tx_agg(tp);
if (!agg)
return;
@ -1382,15 +1388,10 @@ static netdev_tx_t rtl8152_start_xmit(struct sk_buff *skb,
skb_tx_timestamp(skb);
spin_lock_irqsave(&tp->tx_lock, flags);
if (!list_empty(&tp->tx_free) && skb_queue_empty(&tp->tx_queue)) {
struct list_head *cursor;
cursor = tp->tx_free.next;
list_del_init(cursor);
agg = list_entry(cursor, struct tx_agg, list);
}
spin_unlock_irqrestore(&tp->tx_lock, flags);
/* 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);