Date: Fri, 15 Feb 2008 04:50:16 GMT From: Sepherosa Ziehau <sephe@FreeBSD.org> To: Perforce Change Reviews <perforce@FreeBSD.org> Subject: PERFORCE change 135423 for review Message-ID: <200802150450.m1F4oGPj000909@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=135423 Change 135423 by sephe@sephe_zealot:sam_wifi on 2008/02/15 04:49:16 Don't include multicast packets into TX rate control calculation. Noticed by: sam Obtained from: DragonFly Affected files ... .. //depot/projects/wifi/sys/dev/bwi/if_bwi.c#16 edit Differences ... ==== //depot/projects/wifi/sys/dev/bwi/if_bwi.c#16 (text+ko) ==== @@ -32,7 +32,6 @@ * SUCH DAMAGE. * * $DragonFly: src/sys/dev/netif/bwi/if_bwi.c,v 1.18 2008/01/15 09:01:13 sephe Exp $ - * 1.8 is not merged */ #include <sys/cdefs.h> @@ -118,7 +117,7 @@ static void bwi_stop(struct bwi_softc *); static int bwi_newbuf(struct bwi_softc *, int, int); static int bwi_encap(struct bwi_softc *, int, struct mbuf *, - struct ieee80211_node *); + struct ieee80211_node **); static void bwi_init_rxdesc_ring32(struct bwi_softc *, uint32_t, bus_addr_t, int, int); @@ -1383,7 +1382,7 @@ } wh = NULL; /* Catch any invalid use */ - if (bwi_encap(sc, idx, m, ni) != 0) { + if (bwi_encap(sc, idx, m, &ni) != 0) { /* 'm' is freed in bwi_encap() if we reach here */ if (ni != NULL) ieee80211_free_node(ni); @@ -2922,9 +2921,10 @@ static int bwi_encap(struct bwi_softc *sc, int idx, struct mbuf *m, - struct ieee80211_node *ni) + struct ieee80211_node **ni0) { struct ieee80211com *ic = &sc->sc_ic; + struct ieee80211_node *ni = *ni0; struct bwi_ring_data *rd = &sc->sc_tx_rdata[BWI_TX_DATA_RING]; struct bwi_txbuf_data *tbd = &sc->sc_tx_bdata[BWI_TX_DATA_RING]; struct bwi_txbuf *tb = &tbd->tbd_buf[idx]; @@ -2935,7 +2935,7 @@ uint32_t mac_ctrl; uint16_t phy_ctrl; bus_addr_t paddr; - int pkt_len, error; + int pkt_len, error, mcast_pkt = 0; #if 0 const uint8_t *p; int i; @@ -2954,9 +2954,10 @@ * Find TX rate */ bzero(tb->tb_rate_idx, sizeof(tb->tb_rate_idx)); - if (IEEE80211_IS_MULTICAST(wh->i_addr1)) + if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { rate = rate_fb = ic->ic_mcast_rate; - else if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { + mcast_pkt = 1; + } else if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { rate = ni->ni_rates.rs_rates[ni->ni_txrate] & IEEE80211_RATE_VAL; rate_fb = (ni->ni_txrate > 0) ? @@ -2999,7 +3000,7 @@ bcopy(wh->i_fc, hdr->txh_fc, sizeof(hdr->txh_fc)); bcopy(wh->i_addr1, hdr->txh_addr1, sizeof(hdr->txh_addr1)); - if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { + if (!mcast_pkt) { uint16_t dur; uint8_t ack_rate; @@ -3070,6 +3071,11 @@ bus_dmamap_sync(sc->sc_buf_dtag, tb->tb_dmap, BUS_DMASYNC_PREWRITE); + if (mcast_pkt) { + /* Don't involve mcast packets into TX rate control */ + ieee80211_free_node(ni); + *ni0 = ni = NULL; + } tb->tb_mbuf = m; tb->tb_ni = ni;
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