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Avoid NULL deref.

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Submitted by:	gavin
MFC after:	1 month
This commit is contained in:
Rui Paulo 2010-04-07 17:49:47 +00:00
parent a31532b4ad
commit 4a67d9e8b1
1 changed files with 1 additions and 1 deletions
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2
sys/dev/bwi/if_bwi.c
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@ -3368,10 +3368,10 @@ _bwi_txeof(struct bwi_softc *sc, uint16_t tx_id, int acked, int data_txcnt)
bus_dmamap_unload(sc->sc_buf_dtag, tb->tb_dmap);
ni = tb->tb_ni;
vap = ni->ni_vap;
if (tb->tb_ni != NULL) {
const struct bwi_txbuf_hdr *hdr =
mtod(tb->tb_mbuf, const struct bwi_txbuf_hdr *);
vap = ni->ni_vap;
/* NB: update rate control only for unicast frames */
if (hdr->txh_mac_ctrl & htole32(BWI_TXH_MAC_C_ACK)) {