diff options
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index e393995d283..b0813c3286b 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -319,21 +319,29 @@ struct napi_struct { enum { NAPI_STATE_SCHED, /* Poll is scheduled */ + NAPI_STATE_DISABLE, /* Disable pending */ }; extern void FASTCALL(__napi_schedule(struct napi_struct *n)); +static inline int napi_disable_pending(struct napi_struct *n) +{ + return test_bit(NAPI_STATE_DISABLE, &n->state); +} + /** * napi_schedule_prep - check if napi can be scheduled * @n: napi context * * Test if NAPI routine is already running, and if not mark * it as running. This is used as a condition variable - * insure only one NAPI poll instance runs + * insure only one NAPI poll instance runs. We also make + * sure there is no pending NAPI disable. */ static inline int napi_schedule_prep(struct napi_struct *n) { - return !test_and_set_bit(NAPI_STATE_SCHED, &n->state); + return !napi_disable_pending(n) && + !test_and_set_bit(NAPI_STATE_SCHED, &n->state); } /** @@ -389,8 +397,10 @@ static inline void napi_complete(struct napi_struct *n) */ static inline void napi_disable(struct napi_struct *n) { + set_bit(NAPI_STATE_DISABLE, &n->state); while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) msleep(1); + clear_bit(NAPI_STATE_DISABLE, &n->state); } /** @@ -1268,7 +1278,7 @@ static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) static inline int netif_rx_schedule_prep(struct net_device *dev, struct napi_struct *napi) { - return netif_running(dev) && napi_schedule_prep(napi); + return napi_schedule_prep(napi); } /* Add interface to tail of rx poll list. This assumes that _prep has |