From 73301065ac320b691e074b230a05ce24b26794f3 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 23 Sep 2020 07:13:06 +0200 Subject: [PATCH] mt76: mt7615: reduce maximum VHT MPDU length to 7991 After fixing mac80211 to allow larger A-MSDUs in some cases, there have been reports of performance regressions and packet loss with some clients. It appears that the issue occurs when the hardware is transmitting A-MSDUs bigger than 8k. Limit the local VHT MPDU size capability to 7991, matching the value used for MT7915 as well. Signed-off-by: Felix Fietkau --- mt7615/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mt7615/init.c b/mt7615/init.c index 00dc9e18..84b918b2 100644 --- a/mt7615/init.c +++ b/mt7615/init.c @@ -490,7 +490,7 @@ void mt7615_init_device(struct mt7615_dev *dev) dev->mphy.sband_2g.sband.ht_cap.cap |= IEEE80211_HT_CAP_LDPC_CODING; dev->mphy.sband_5g.sband.ht_cap.cap |= IEEE80211_HT_CAP_LDPC_CODING; dev->mphy.sband_5g.sband.vht_cap.cap |= - IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 | + IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; mt7615_cap_dbdc_disable(dev); dev->phy.dfs_state = -1;