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mt76: mt7615: reduce maximum VHT MPDU length to 7991

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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 <[email protected]>
This commit is contained in:
Felix Fietkau
2020-09-23 07:24:47 +02:00
parent ec84891a4d
commit 73301065ac
1 changed files with 1 additions and 1 deletions
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mt7615/init.c
+1 -1
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@@ -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;