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-rw-r--r--net/packet/af_packet.c13
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;
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