1 files changed, 8 insertions, 0 deletions

diff --git a/sys/pci/if_sis.c b/sys/pci/if_sis.c
index d9ce3e64e5fa..22d83b503f7e 100644
--- a/sys/pci/if_sis.c
+++ b/sys/pci/if_sis.c
@@ -2004,6 +2004,14 @@ sis_initl(struct sis_softc *sc)
 		SIS_CLRBIT(sc, SIS_RX_CFG, SIS_RXCFG_RX_TXPKTS);
 	}
 
+	if (sc->sis_type == SIS_TYPE_83816) {
+		/*
+		 * MPII03.D: Half Duplex Excessive Collisions.
+		 * Also page 49 in 83816 manual
+		 */
+		SIS_SETBIT(sc, SIS_TX_CFG, SIS_TXCFG_MPII03D);
+	}
+
 	if (sc->sis_type == SIS_TYPE_83815 &&
 	     IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX) {
 		uint32_t reg;