[rtems-libbsd commit] ffec: Add wmb() to descriptor updates

[Sebastian Huber]

Module:    rtems-libbsd
Branch:    master
Commit:    a70edfc49a469645cac275b5f2b0d69ca8219aa8
Changeset: http://git.rtems.org/rtems-libbsd/commit/?id=a70edfc49a469645cac275b5f2b0d69ca8219aa8

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Wed Sep 27 09:37:38 2017 +0200

ffec: Add wmb() to descriptor updates

---

 freebsd/sys/dev/ffec/if_ffec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/freebsd/sys/dev/ffec/if_ffec.c b/freebsd/sys/dev/ffec/if_ffec.c
index e0dff34..1173663 100644
--- a/freebsd/sys/dev/ffec/if_ffec.c
+++ b/freebsd/sys/dev/ffec/if_ffec.c
@@ -593,6 +593,7 @@ ffec_setup_txdesc(struct ffec_softc *sc, int idx, bus_addr_t paddr,
 	 * significant bits.
 	 */
 	sc->txdesc_ring[idx].buf_paddr = (uint32_t)paddr;
+	wmb();
 	sc->txdesc_ring[idx].flags_len = flags | len; /* Must be set last! */
 
 	return (nidx);
@@ -739,6 +740,7 @@ ffec_setup_rxdesc(struct ffec_softc *sc, int idx, bus_addr_t paddr)
 	 */
 	nidx = next_rxidx(sc, idx);
 	sc->rxdesc_ring[idx].buf_paddr = (uint32_t)paddr;
+	wmb();
 	sc->rxdesc_ring[idx].flags_len = FEC_RXDESC_EMPTY | 
 		((nidx == 0) ? FEC_RXDESC_WRAP : 0);