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ath10k: AP: handle HT station which does not have HT RX MCS

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This is a workaround for HT-enabled STAs which break the spec
and have no HT capabilities RX mask (no HT RX MCS map).

As per spec, in section 20.3.5 Modulation and coding scheme (MCS),
MCS 0 through 7 are mandatory in 20MHz with 800 ns GI at all STAs.

Firmware asserts if such situation occurs.

Signed-off-by: Bartosz Markowski <bartosz.markowski@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Bartosz Markowski 2014-02-10 13:12:55 +01:00 committed by Kalle Valo
parent 00f5482bcd
commit fd71f80737
1 changed files with 17 additions and 2 deletions
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15
drivers/net/wireless/ath/ath10k/mac.c
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@ -1148,8 +1148,23 @@ static void ath10k_peer_assoc_h_ht(struct ath10k *ar,
if (ht_cap->mcs.rx_mask[i/8] & (1 << i%8))
arg->peer_ht_rates.rates[n++] = i;
/*
* This is a workaround for HT-enabled STAs which break the spec
* and have no HT capabilities RX mask (no HT RX MCS map).
*
* As per spec, in section 20.3.5 Modulation and coding scheme (MCS),
* MCS 0 through 7 are mandatory in 20MHz with 800 ns GI at all STAs.
*
* Firmware asserts if such situation occurs.
*/
if (n == 0) {
arg->peer_ht_rates.num_rates = 8;
for (i = 0; i < arg->peer_ht_rates.num_rates; i++)
arg->peer_ht_rates.rates[i] = i;
} else {
arg->peer_ht_rates.num_rates = n;
arg->peer_num_spatial_streams = sta->rx_nss;
}
ath10k_dbg(ATH10K_DBG_MAC, "mac ht peer %pM mcs cnt %d nss %d\n",
arg->addr,