diff --git a/net/core/dev.c b/net/core/dev.c index 493ae8ee569f12d30ca58eb2c13e54d451f592b9..c0cf1293df0605d75551a56d1d03b251ece6918b 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -4602,6 +4602,15 @@ static int napi_poll(struct napi_struct *n, struct list_head *repoll) napi_gro_flush(n, HZ >= 1000); } + /* Some drivers may have called napi_schedule + * prior to exhausting their budget. + */ + if (unlikely(!list_empty(&n->poll_list))) { + pr_warn_once("%s: Budget exhausted after napi rescheduled\n", + n->dev ? n->dev->name : "backlog"); + goto out_unlock; + } + list_add_tail(&n->poll_list, repoll); out_unlock: