net: rps: fix cpu unplug

[pandora-kernel.git] / net / core / dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index fcb5133..81e5f55 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6338,10 +6338,20 @@ static int dev_cpu_callback(struct notifier_block *nfb,
                oldsd->output_queue = NULL;
                oldsd->output_queue_tailp = &oldsd->output_queue;
        }
-       /* Append NAPI poll list from offline CPU. */
-       if (!list_empty(&oldsd->poll_list)) {
-               list_splice_init(&oldsd->poll_list, &sd->poll_list);
-               raise_softirq_irqoff(NET_RX_SOFTIRQ);
+       /* Append NAPI poll list from offline CPU, with one exception :
+        * process_backlog() must be called by cpu owning percpu backlog.
+        * We properly handle process_queue & input_pkt_queue later.
+        */
+       while (!list_empty(&oldsd->poll_list)) {
+               struct napi_struct *napi = list_first_entry(&oldsd->poll_list,
+                                                           struct napi_struct,
+                                                           poll_list);
+
+               list_del_init(&napi->poll_list);
+               if (napi->poll == process_backlog)
+                       napi->state = 0;
+               else
+                       ____napi_schedule(sd, napi);
        }
 
        raise_softirq_irqoff(NET_TX_SOFTIRQ);
@@ -6352,7 +6362,7 @@ static int dev_cpu_callback(struct notifier_block *nfb,
                netif_rx(skb);
                input_queue_head_incr(oldsd);
        }
-       while ((skb = __skb_dequeue(&oldsd->input_pkt_queue))) {
+       while ((skb = skb_dequeue(&oldsd->input_pkt_queue))) {
                netif_rx(skb);
                input_queue_head_incr(oldsd);
        }