2021-11-25 19:18:40

by Felix Fietkau

[permalink] [raw]
Subject: [PATCH 1/2] mt76: clear sta powersave flag after notifying driver

If the driver has configured the hardware to drop packets for a sta that was
in powersave mode, then clearing the flag too early opens up a small race
window during which packets could be dropped on wakeup

Signed-off-by: Felix Fietkau <[email protected]>
---
drivers/net/wireless/mediatek/mt76/mac80211.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c
index acf400fa8469..f11a2c6c3364 100644
--- a/drivers/net/wireless/mediatek/mt76/mac80211.c
+++ b/drivers/net/wireless/mediatek/mt76/mac80211.c
@@ -1163,10 +1163,12 @@ mt76_check_sta(struct mt76_dev *dev, struct sk_buff *skb)

if (ps)
set_bit(MT_WCID_FLAG_PS, &wcid->flags);
- else
- clear_bit(MT_WCID_FLAG_PS, &wcid->flags);

dev->drv->sta_ps(dev, sta, ps);
+
+ if (!ps)
+ clear_bit(MT_WCID_FLAG_PS, &wcid->flags);
+
ieee80211_sta_ps_transition(sta, ps);
}

--
2.30.1



2021-11-25 19:18:41

by Felix Fietkau

[permalink] [raw]
Subject: [PATCH 2/2] mt76: mt7603: improve reliability of tx powersave filtering

Leave more time to abort transmissions (which could happen at low CCK rates)
Only warn if the last filter command is stuck

Signed-off-by: Felix Fietkau <[email protected]>
---
drivers/net/wireless/mediatek/mt76/mt7603/mac.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
index a9ac61b9f854..a272d64808c3 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
@@ -202,10 +202,11 @@ void mt7603_filter_tx(struct mt7603_dev *dev, int idx, bool abort)
FIELD_PREP(MT_DMA_FQCR0_DEST_PORT_ID, port) |
FIELD_PREP(MT_DMA_FQCR0_DEST_QUEUE_ID, queue));

- WARN_ON_ONCE(!mt76_poll(dev, MT_DMA_FQCR0, MT_DMA_FQCR0_BUSY,
- 0, 5000));
+ mt76_poll(dev, MT_DMA_FQCR0, MT_DMA_FQCR0_BUSY, 0, 15000);
}

+ WARN_ON_ONCE(mt76_rr(dev, MT_DMA_FQCR0) & MT_DMA_FQCR0_BUSY);
+
mt76_wr(dev, MT_TX_ABORT, 0);

mt7603_wtbl_set_skip_tx(dev, idx, false);
--
2.30.1