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mac80211: allow bigger A-MSDU sizes in VHT, even if HT is limited

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Some APs (e.g. Asus RT-AC88U) have been observed to report an HT MSDU size
limit of 3839 and a VHT limit of 7991. These APs can handle bigger frames
than 3839 bytes just fine, so we should remove the VHT limit based on the
HT capabilities. This improves tx throughput.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20200916164611.8022-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Felix Fietkau 2020-09-16 18:46:11 +02:00 committed by Johannes Berg
parent 11b34737b1
commit 5595870f77
1 changed files with 0 additions and 4 deletions
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4
net/mac80211/vht.c
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@ -315,10 +315,6 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
/* If HT IE reported 3839 bytes only, stay with that size. */
if (sta->sta.max_amsdu_len == IEEE80211_MAX_MPDU_LEN_HT_3839)
return;
switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) {
case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;