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

[Simon Goldschmidt]

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;
  }
  pbuf_free(p);
  p = q;
}
/* go on sending single-pbuf */

This handles future error cases, too.

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