diff options
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 853c8b575f1..02e7d8377c4 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2172,7 +2172,15 @@ static void net_rx_action(struct softirq_action *h) weight = n->weight; - work = n->poll(n, weight); + /* This NAPI_STATE_SCHED test is for avoiding a race + * with netpoll's poll_napi(). Only the entity which + * obtains the lock and sees NAPI_STATE_SCHED set will + * actually make the ->poll() call. Therefore we avoid + * accidently calling ->poll() when NAPI is not scheduled. + */ + work = 0; + if (test_bit(NAPI_STATE_SCHED, &n->state)) + work = n->poll(n, weight); WARN_ON_ONCE(work > weight); |