commit b2e41f5edd26b7990906fe2678b3fcf45ef7c690
Author: Ryota Ozaki <ozaki-r@iij.ad.jp>
Date:   Tue Jan 19 18:45:59 2016 +0900

    Disable flowcontrol (tmp)

diff --git a/sys/dev/pci/if_wm.c b/sys/dev/pci/if_wm.c
index 4124859..c900f7e 100644
--- a/sys/dev/pci/if_wm.c
+++ b/sys/dev/pci/if_wm.c
@@ -2793,6 +2793,7 @@ wm_ioctl(struct ifnet *ifp, u_long cmd, void *data)
 		if (IFM_SUBTYPE(ifr->ifr_media) == IFM_AUTO ||
 		    (ifr->ifr_media & IFM_FDX) == 0)
 			ifr->ifr_media &= ~IFM_ETH_FMASK;
+#if 0
 		if (IFM_SUBTYPE(ifr->ifr_media) != IFM_AUTO) {
 			if ((ifr->ifr_media & IFM_ETH_FMASK) == IFM_FLOW) {
 				/* We can do both TXPAUSE and RXPAUSE. */
@@ -2801,6 +2802,10 @@ wm_ioctl(struct ifnet *ifp, u_long cmd, void *data)
 			}
 			sc->sc_flowflags = ifr->ifr_media & IFM_ETH_FMASK;
 		}
+#else
+		sc->sc_flowflags = 0;
+#endif
+
 		WM_CORE_UNLOCK(sc);
 #ifdef WM_MPSAFE
 		s = splnet();
@@ -8802,6 +8807,7 @@ wm_gmii_statchg(struct ifnet *ifp)
 		mii->mii_media_active &= ~IFM_ETH_FMASK;
 	}
 
+#if 0
 	if (sc->sc_flowflags & IFM_FLOW) {
 		if (sc->sc_flowflags & IFM_ETH_TXPAUSE) {
 			sc->sc_ctrl |= CTRL_TFCE;
@@ -8810,6 +8816,7 @@ wm_gmii_statchg(struct ifnet *ifp)
 		if (sc->sc_flowflags & IFM_ETH_RXPAUSE)
 			sc->sc_ctrl |= CTRL_RFCE;
 	}
+#endif
 
 	if (sc->sc_mii.mii_media_active & IFM_FDX) {
 		DPRINTF(WM_DEBUG_LINK,