diff options
| -rw-r--r-- | net/packet/af_packet.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 85bb38c..d5495d8 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -2156,6 +2156,7 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg) int err, reserve = 0; void *ph; struct sockaddr_ll *saddr = (struct sockaddr_ll *)msg->msg_name; + bool need_wait = !(msg->msg_flags & MSG_DONTWAIT); int tp_len, size_max; unsigned char *addr; int len_sum = 0; @@ -2198,10 +2199,10 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg) do { ph = packet_current_frame(po, &po->tx_ring, - TP_STATUS_SEND_REQUEST); - + TP_STATUS_SEND_REQUEST); if (unlikely(ph == NULL)) { - schedule(); + if (need_wait && need_resched()) + schedule(); continue; } @@ -2255,10 +2256,8 @@ static int tpacket_snd(struct packet_sock *po, struct msghdr *msg) } packet_increment_head(&po->tx_ring); len_sum += tp_len; - } while (likely((ph != NULL) || - ((!(msg->msg_flags & MSG_DONTWAIT)) && - (atomic_read(&po->tx_ring.pending)))) - ); + } while (likely((ph != NULL) || (need_wait && + atomic_read(&po->tx_ring.pending)))); err = len_sum; goto out_put; |
