From: Felix Fietkau <nbd@xxxxxxxx> [ Upstream commit efb1676306f664625c0c546dd10d18d33c75e3fc ] 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 <nbd@xxxxxxxx> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20200923052442.24141-1-nbd@xxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/wireless/mediatek/mt76/mt7615/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/init.c b/drivers/net/wireless/mediatek/mt76/mt7615/init.c index e2d80518e5af9..992a36602ad4c 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/init.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/init.c @@ -453,7 +453,7 @@ 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; -- 2.25.1
