[PATCH AUTOSEL 5.8 06/24] mt76: mt7615: reduce maximum VHT MPDU length to 7991
From: Sasha Levin <sashal@kernel.org>
Date: 2020-10-12 19:10:05
Also in:
linux-arm-kernel, linux-mediatek, linux-wireless, lkml, stable
Subsystem:
mediatek mt76 wireless lan driver, the rest · Maintainers:
Felix Fietkau, Lorenzo Bianconi, Ryder Lee, Linus Torvalds
From: Felix Fietkau <nbd@nbd.name> [ 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@nbd.name> Signed-off-by: Kalle Valo <redacted> Link: https://lore.kernel.org/r/20200923052442.24141-1-nbd@nbd.name (local) Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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