Note: this is the fourth version of this patch.

Apply by doing
	cd /usr/src/sys/arch/sparc/dev
	patch -p0 < le.patch

And then rebuild your kernel.

Index: if_le.c
===================================================================
RCS file: /cvs/src/sys/arch/sparc/dev/if_le.c,v
retrieving revision 1.13
retrieving revision 1.15
diff -u -r1.13 -r1.15
--- if_le.c	1998/11/11 00:50:31	1.13
+++ if_le.c	1998/12/22 15:40:30	1.15
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_le.c,v 1.13 1998/11/11 00:50:31 jason Exp $	*/
+/*	$OpenBSD: if_le.c,v 1.15 1998/12/22 15:40:30 jason Exp $	*/
 /*	$NetBSD: if_le.c,v 1.50 1997/09/09 20:54:48 pk Exp $	*/
 
 /*-
@@ -105,7 +105,7 @@
 	void	*arg;
 {
 	register struct le_softc *lesc = arg;
-static int dodrain=0;
+	static int dodrain=0;
 
 	if (lesc->sc_dma->sc_regs->csr & D_ERR_PEND) {
 		dodrain = 1;
@@ -213,6 +213,9 @@
 {
 	struct am7990_softc *sc = ifp->if_softc;
 	struct ifmedia *ifm = &sc->sc_ifmedia;
+#if defined(SUN4M)
+	struct le_softc *lesc = (struct le_softc *)sc;
+#endif
 
 	if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
 		return (EINVAL);
@@ -226,14 +229,14 @@
 	switch (IFM_SUBTYPE(ifm->ifm_media)) {
 #if defined(SUN4M)
 	case IFM_10_T:
-		if (CPU_ISSUN4M)
+		if (CPU_ISSUN4M && lesc->sc_dma)
 			lesetutp(sc);
 		else
 			return (EOPNOTSUPP);
 		break;
 
 	case IFM_AUTO:
-		if (CPU_ISSUN4M)
+		if (CPU_ISSUN4M && lesc->sc_dma)
 			return (0);
 		else
 			return (EOPNOTSUPP);
@@ -242,7 +245,7 @@
 
 	case IFM_10_5:
 #if defined(SUN4M)
-		if (CPU_ISSUN4M)
+		if (CPU_ISSUN4M && lesc->sc_dma)
 			lesetaui(sc);
 #else
 		return (0);