diff options
Diffstat (limited to 'nuttx/net/sendto.c')
| -rw-r--r-- | nuttx/net/sendto.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/nuttx/net/sendto.c b/nuttx/net/sendto.c index 519510fe6..57c37668b 100644 --- a/nuttx/net/sendto.c +++ b/nuttx/net/sendto.c @@ -94,7 +94,7 @@ struct sendto_s ****************************************************************************/ #ifdef CONFIG_NET_UDP -uint16 sendto_interrupt(struct uip_driver_s *dev, void *conn, void *pvprivate, uint16 flags) +static uint16 sendto_interrupt(struct uip_driver_s *dev, void *conn, void *pvprivate, uint16 flags) { struct sendto_s *pstate = (struct sendto_s *)pvprivate; @@ -111,12 +111,16 @@ uint16 sendto_interrupt(struct uip_driver_s *dev, void *conn, void *pvprivate, u } /* Check if the outgoing packet is available (it may have been claimed - * by a sendto interrupt serving a different thread. + * by a sendto interrupt serving a different thread -OR- if the output + * buffer currently contains unprocessed incoming data. In these cases + * we will just have to wait for the next polling cycle. */ - else if (dev->d_sndlen > 0) + else if (dev->d_sndlen > 0 || (flags & UIP_NEWDATA) != 0) { - /* Another thread has beat us sending data, wait for the next poll */ + /* Another thread has beat us sending data or the buffer is busy, + * wait for the next polling cycle + */ return flags; } |