Make use of m_defrag() in re_encap().

diff --git a/sys/dev/ic/re.c b/sys/dev/ic/re.c
index 32219a7..439d8ec 100644 (file)
--- a/sys/dev/ic/re.c
+++ b/sys/dev/ic/re.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: re.c,v 1.163 2014/11/24 10:33:37 brad Exp $   */
+/*     $OpenBSD: re.c,v 1.164 2014/12/19 04:53:58 brad Exp $   */
 /*     $FreeBSD: if_re.c,v 1.31 2004/09/04 07:54:05 ru Exp $   */
 /*
  * Copyright (c) 1997, 1998-2003
@@ -1635,12 +1635,21 @@ re_encap(struct rl_softc *sc, struct mbuf *m, int *idx)
 
        txq = &sc->rl_ldata.rl_txq[*idx];
        map = txq->txq_dmamap;
+
        error = bus_dmamap_load_mbuf(sc->sc_dmat, map, m,
            BUS_DMA_WRITE|BUS_DMA_NOWAIT);
-       if (error) {
-               /* XXX try to defrag if EFBIG? */
-               printf("%s: can't map mbuf (error %d)\n",
-                   sc->sc_dev.dv_xname, error);
+       switch (error) {
+       case 0:
+               break;
+
+       case EFBIG:
+               if ((error = m_defrag(m, M_DONTWAIT)) == 0 &&
+                   (error = bus_dmamap_load_mbuf(sc->sc_dmat, map, m,
+                   BUS_DMA_WRITE|BUS_DMA_NOWAIT)) == 0)
+                       break;
+
+               /* FALLTHROUGH */
+       default:
                return (error);
        }