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| author | Stephen Hemminger <shemminger@linux-foundation.org> | 2007-11-19 19:18:11 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 14:54:16 -0800 |
| commit | 5106930bd6b57402205e3de54dae9476e215b622 (patch) | |
| tree | 180a77fe9a8bed0718a849ac91c4bc7866912a1e | |
| parent | 0adc9add7709f87995c003c0ccb085076afdc923 (diff) | |
| download | linux-3.10-5106930bd6b57402205e3de54dae9476e215b622.tar.gz linux-3.10-5106930bd6b57402205e3de54dae9476e215b622.tar.bz2 linux-3.10-5106930bd6b57402205e3de54dae9476e215b622.zip | |
[NETPOLL]: netpoll_poll() cleanup
Restructure code slightly to improve readability:
* dereference device once
* change obvious while() loop
* let poll_napi() handle null list itself
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/core/netpoll.c | 32 |
1 files changed, 14 insertions, 18 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c index f63a70be3cd..250868f6876 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -139,16 +139,15 @@ static int poll_one_napi(struct netpoll_info *npinfo, return budget - work; } -static void poll_napi(struct netpoll *np) +static void poll_napi(struct net_device *dev) { - struct netpoll_info *npinfo = np->dev->npinfo; struct napi_struct *napi; int budget = 16; - list_for_each_entry(napi, &np->dev->napi_list, dev_list) { + list_for_each_entry(napi, &dev->napi_list, dev_list) { if (napi->poll_owner != smp_processor_id() && spin_trylock(&napi->poll_lock)) { - budget = poll_one_napi(npinfo, napi, budget); + budget = poll_one_napi(dev->npinfo, napi, budget); spin_unlock(&napi->poll_lock); if (!budget) @@ -159,30 +158,27 @@ static void poll_napi(struct netpoll *np) static void service_arp_queue(struct netpoll_info *npi) { - struct sk_buff *skb; - - if (unlikely(!npi)) - return; + if (npi) { + struct sk_buff *skb; - skb = skb_dequeue(&npi->arp_tx); - - while (skb != NULL) { - arp_reply(skb); - skb = skb_dequeue(&npi->arp_tx); + while ((skb = skb_dequeue(&npi->arp_tx))) + arp_reply(skb); } } void netpoll_poll(struct netpoll *np) { - if (!np->dev || !netif_running(np->dev) || !np->dev->poll_controller) + struct net_device *dev = np->dev; + + if (!dev || !netif_running(dev) || !dev->poll_controller) return; /* Process pending work on NIC */ - np->dev->poll_controller(np->dev); - if (!list_empty(&np->dev->napi_list)) - poll_napi(np); + dev->poll_controller(dev); + + poll_napi(dev); - service_arp_queue(np->dev->npinfo); + service_arp_queue(dev->npinfo); zap_completion_queue(); } |