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[lwip-devel] [bug #50694] TX exist more pbufs after enable LWIP_NETIF_TX

From: Simon Goldschmidt
Subject: [lwip-devel] [bug #50694] TX exist more pbufs after enable LWIP_NETIF_TX_SINGLE_PBUF
Date: Mon, 24 Apr 2017 15:07:45 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36

Follow-up Comment #5, bug #50694 (project lwip):

To ensure linkoutput gets only packets in one piece, you can always add this
to your driver:

if (p->next != NULL) {
  struct pbuf *q = pbuf_coalesce(p, PBUF_RAW_TX);
  if (q == p) {
    /* memory error */
    return ERR_MEM;
  p = q;
/* go on sending single-pbuf */

This handles future error cases, too.


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