Merge remote-tracking branch 'remotes/stefanha/tags/net-pull-request' into staging

Net patches

# gpg: Signature made Wed 12 Mar 2014 13:48:20 GMT using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* remotes/stefanha/tags/net-pull-request:
  tap: avoid deadlocking rx

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/net/tap.c b/net/tap.c
index 2d5099b9be..8847ce100a 100644
--- a/net/tap.c
+++ b/net/tap.c
@@ -190,7 +190,7 @@ static void tap_send(void *opaque)
     TAPState *s = opaque;
     int size;
 
-    do {
+    while (qemu_can_send_packet(&s->nc)) {
         uint8_t *buf = s->buf;
 
         size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
@@ -206,8 +206,11 @@ static void tap_send(void *opaque)
         size = qemu_send_packet_async(&s->nc, buf, size, tap_send_completed);
         if (size == 0) {
             tap_read_poll(s, false);
+            break;
+        } else if (size < 0) {
+            break;
         }
-    } while (size > 0 && qemu_can_send_packet(&s->nc));
+    }
 }
 
 static bool tap_has_ufo(NetClientState *nc)