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wcn36xx: Fix warning due to bad rate_idx

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The rate_idx is the index of the bitrate in the supported rate table.
However the 5Ghz band has a smaller legacy bitrate table than 2.4Ghz
since it does not have the DSSS bitrates (1, 2, 5.5, 11).

So in 5Ghz band the index should adjusted accrodingly (-4).

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
[bod: Made sure fix is only applied if the rate_idx > n_bitrates]
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200829033846.2167619-6-bryan.odonoghue@linaro.org
This commit is contained in:
Loic Poulain 2020-08-29 04:38:41 +01:00 committed by Kalle Valo
parent 10630b150b
commit 6ea131acea
1 changed files with 9 additions and 0 deletions
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9
drivers/net/wireless/ath/wcn36xx/txrx.c
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@ -230,6 +230,7 @@ int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
const struct wcn36xx_rate *rate;
struct ieee80211_hdr *hdr;
struct wcn36xx_rx_bd *bd;
struct ieee80211_supported_band *sband;
u16 fc, sn;
/*
@ -270,6 +271,14 @@ int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)
status.enc_flags = rate->encoding_flags;
status.bw = rate->bw;
status.rate_idx = rate->mcs_or_legacy_index;
sband = wcn->hw->wiphy->bands[status.band];
if (status.band == NL80211_BAND_5GHZ &&
status.encoding == RX_ENC_LEGACY &&
status.rate_idx >= sband->n_bitrates) {
/* no dsss rates in 5Ghz rates table */
status.rate_idx -= 4;
}
} else {
status.encoding = 0;
status.bw = 0;