diff options
| -rw-r--r-- | include/linux/netdevice.h | 7 | ||||
| -rw-r--r-- | net/core/netpoll.c | 2 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 9d77b1d7dca..e26f5495289 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -319,6 +319,7 @@ enum { NAPI_STATE_SCHED, /* Poll is scheduled */ NAPI_STATE_DISABLE, /* Disable pending */ + NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ }; extern void __napi_schedule(struct napi_struct *n); @@ -1497,6 +1498,12 @@ static inline void netif_rx_complete(struct net_device *dev, { unsigned long flags; + /* + * don't let napi dequeue from the cpu poll list + * just in case its running on a different cpu + */ + if (unlikely(test_bit(NAPI_STATE_NPSVC, &napi->state))) + return; local_irq_save(flags); __netif_rx_complete(dev, napi); local_irq_restore(flags); diff --git a/net/core/netpoll.c b/net/core/netpoll.c index 6c7af390be0..dadac6281f2 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -133,9 +133,11 @@ static int poll_one_napi(struct netpoll_info *npinfo, npinfo->rx_flags |= NETPOLL_RX_DROP; atomic_inc(&trapped); + set_bit(NAPI_STATE_NPSVC, &napi->state); work = napi->poll(napi, budget); + clear_bit(NAPI_STATE_NPSVC, &napi->state); atomic_dec(&trapped); npinfo->rx_flags &= ~NETPOLL_RX_DROP; |