diff options
| author | Jonathan Matthew <jmatthew@cvs.openbsd.org> | 2022-07-19 21:49:23 +0000 |
|---|---|---|
| committer | Jonathan Matthew <jmatthew@cvs.openbsd.org> | 2022-07-19 21:49:23 +0000 |
| commit | 50b3eddbc034f1a77e9752c5ee72895957345f7d (patch) | |
| tree | 1cd1323168424a50b125c8f281390ed67b62ba4d /sys/dev | |
| parent | edb6687f1257afd253e934480432239496e4570e (diff) | |
Fix up tx ring slot calculations so we store the mbuf and dma map with
the last slot of the packet rather than the first slot of the next.
ok dlg@
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/fdt/if_mvneta.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sys/dev/fdt/if_mvneta.c b/sys/dev/fdt/if_mvneta.c index 2339ca82186..9ee7a9c5ab0 100644 --- a/sys/dev/fdt/if_mvneta.c +++ b/sys/dev/fdt/if_mvneta.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if_mvneta.c,v 1.26 2022/06/05 02:54:18 dlg Exp $ */ +/* $OpenBSD: if_mvneta.c,v 1.27 2022/07/19 21:49:22 jmatthew Exp $ */ /* $NetBSD: if_mvneta.c,v 1.41 2015/04/15 10:15:40 hsuenaga Exp $ */ /* * Copyright (c) 2007, 2008, 2013 KIYOHARA Takashi @@ -975,11 +975,15 @@ mvneta_start(struct ifqueue *ifq) mvneta_encap(sc, map, m, prod); - nprod = (prod + map->dm_nsegs) % MVNETA_TX_RING_CNT; - sc->sc_txbuf[prod].tb_map = sc->sc_txbuf[nprod].tb_map; - prod = nprod; - sc->sc_txbuf[prod].tb_map = map; + if (map->dm_nsegs > 1) { + nprod = (prod + (map->dm_nsegs - 1)) % + MVNETA_TX_RING_CNT; + sc->sc_txbuf[prod].tb_map = sc->sc_txbuf[nprod].tb_map; + prod = nprod; + sc->sc_txbuf[prod].tb_map = map; + } sc->sc_txbuf[prod].tb_m = m; + prod = MVNETA_TX_RING_NEXT(prod); free -= map->dm_nsegs; |