[v2] wifi: mt76: clear cipher state on key removal for WED offload

[PATCH wireless v2 0/2] wifi: mt76: clear cipher state on key removal for WED offload

Joshua Klinesmith posted 2 patches 2 months, 1 week ago

Diff against v1
Download series mbox

drivers/net/wireless/mediatek/mt76/mt7915/main.c | 6 ++++++
drivers/net/wireless/mediatek/mt76/mt7996/main.c | 7 +++++++
2 files changed, 13 insertions(+)

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[PATCH wireless v2 0/2] wifi: mt76: clear cipher state on key removal for WED offload

Posted by Joshua Klinesmith 2 months, 1 week ago

When switching WiFi encryption from WPA-PSK/SAE to open/none with
WED hardware offload enabled, throughput drops to zero. The BSS
cipher state is set when group keys are installed but never cleared
when they are removed. The WA firmware retains the stale cipher
value and keeps the protection bit set on WED-offloaded packets,
causing all plaintext frames to be dropped.

Found via reverse engineering of the vendor MediaTek SDK
mt_wifi.ko driver.
---
v1 -> v2: Rebased on wireless.git (was mt76-fixes)

Joshua Klinesmith (2):
  wifi: mt76: mt7915: clear cipher state on key removal for WED offload
  wifi: mt76: mt7996: clear cipher state on key removal for WED offload

 drivers/net/wireless/mediatek/mt76/mt7915/main.c | 6 ++++++
 drivers/net/wireless/mediatek/mt76/mt7996/main.c | 7 +++++++
 2 files changed, 13 insertions(+)


base-commit: 45dbf8fcea4dcf28cabcf4a1778e908feadf4c90
-- 
2.43.0