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mac80211: advertise BF STS according to AP support

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Restrict our published beamformee STS capability according
to the AP value.
Some AP show bad behaviour in interoperability testing
when our capabilities are better.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Eyal Shapira 2014-01-08 15:49:08 +02:00 committed by Johannes Berg
parent c4d2ffac33
commit c1cf6d4e6f
1 changed files with 11 additions and 0 deletions
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11
net/mac80211/mlme.c
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@ -508,6 +508,7 @@ static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
u8 *pos;
u32 cap;
struct ieee80211_sta_vht_cap vht_cap;
u32 mask, ap_bf_sts, our_bf_sts;
BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
@ -535,6 +536,16 @@ static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
our_bf_sts = cap & mask;
if (ap_bf_sts < our_bf_sts) {
cap &= ~mask;
cap |= ap_bf_sts;
}
/* reserve and fill IE */
pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);