mac80211: Check rate->idx before rate->count
The drivers are not required to fill in rate->count if rate->idx is set to -1. Hence, we should first check rate->idx before accessing rate->count. Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com> Acked-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -300,10 +300,10 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
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static bool
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minstrel_ht_txstat_valid(struct ieee80211_tx_rate *rate)
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{
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if (!rate->count)
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if (rate->idx < 0)
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return false;
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if (rate->idx < 0)
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if (!rate->count)
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return false;
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return !!(rate->flags & IEEE80211_TX_RC_MCS);
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