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--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -726,6 +726,8 @@ struct ieee80211_sub_if_data {
/* bitmap of allowed (non-MCS) rate indexes for rate control */
u32 rc_rateidx_mask[IEEE80211_NUM_BANDS];
+
+ bool rc_has_mcs_mask[IEEE80211_NUM_BANDS];
u8 rc_rateidx_mcs_mask[IEEE80211_NUM_BANDS][IEEE80211_HT_MCS_MASK_LEN];
union {
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1914,9 +1914,20 @@ static int ieee80211_set_bitrate_mask(st
}
for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
+ struct ieee80211_supported_band *sband = wiphy->bands[i];
+
sdata->rc_rateidx_mask[i] = mask->control[i].legacy;
memcpy(sdata->rc_rateidx_mcs_mask[i], mask->control[i].mcs,
sizeof(mask->control[i].mcs));
+
+ sdata->rc_has_mcs_mask[i] = false;
+ if (!sband)
+ continue;
+
+ if (memcmp(sdata->rc_rateidx_mcs_mask[i],
+ sband->ht_cap.mcs.rx_mask,
+ sizeof(sband->ht_cap.mcs.rx_mask)) != 0)
+ sdata->rc_has_mcs_mask[i] = true;
}
return 0;
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3645,7 +3645,7 @@ void ieee80211_send_bar(struct ieee80211
* (deprecated; this will be removed once drivers get updated to use
* rate_idx_mask)
* @rate_idx_mask: user-requested (legacy) rate mask
- * @rate_idx_mcs_mask: user-requested MCS rate mask
+ * @rate_idx_mcs_mask: user-requested MCS rate mask (NULL if not in use)
* @bss: whether this frame is sent out in AP or IBSS mode
*/
struct ieee80211_tx_rate_control {
@@ -3657,7 +3657,7 @@ struct ieee80211_tx_rate_control {
bool rts, short_preamble;
u8 max_rate_idx;
u32 rate_idx_mask;
- u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
+ u8 *rate_idx_mcs_mask;
bool bss;
};
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -642,9 +642,11 @@ ieee80211_tx_h_rate_ctrl(struct ieee8021
txrc.max_rate_idx = -1;
else
txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
- memcpy(txrc.rate_idx_mcs_mask,
- tx->sdata->rc_rateidx_mcs_mask[tx->channel->band],
- sizeof(txrc.rate_idx_mcs_mask));
+
+ if (tx->sdata->rc_has_mcs_mask[tx->channel->band])
+ txrc.rate_idx_mcs_mask =
+ tx->sdata->rc_rateidx_mcs_mask[tx->channel->band];
+
txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
tx->sdata->vif.type == NL80211_IFTYPE_ADHOC);
@@ -2479,8 +2481,6 @@ struct sk_buff *ieee80211_beacon_get_tim
txrc.max_rate_idx = -1;
else
txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
- memcpy(txrc.rate_idx_mcs_mask, sdata->rc_rateidx_mcs_mask[band],
- sizeof(txrc.rate_idx_mcs_mask));
txrc.bss = true;
rate_control_get_rate(sdata, NULL, &txrc);
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -461,9 +461,12 @@ void rate_control_get_rate(struct ieee80
* the common case.
*/
mask = sdata->rc_rateidx_mask[info->band];
- memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[info->band],
- sizeof(mcs_mask));
- if (mask != (1 << txrc->sband->n_bitrates) - 1) {
+ if (mask != (1 << txrc->sband->n_bitrates) - 1 || txrc->rate_idx_mcs_mask) {
+ if (txrc->rate_idx_mcs_mask)
+ memcpy(mcs_mask, txrc->rate_idx_mcs_mask, sizeof(mcs_mask));
+ else
+ memset(mcs_mask, 0xff, sizeof(mcs_mask));
+
if (sta) {
/* Filter out rates that the STA does not support */
mask &= sta->sta.supp_rates[info->band];
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