ath10k: AP: handle HT station which does not have HT RX MCS
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>
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index b2c6590..1c305b1 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -1148,8 +1148,23 @@
if (ht_cap->mcs.rx_mask[i/8] & (1 << i%8))
arg->peer_ht_rates.rates[n++] = i;
- arg->peer_ht_rates.num_rates = n;
- arg->peer_num_spatial_streams = sta->rx_nss;
+ /*
+ * 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,