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[75.74.152.49]) by smtp.gmail.com with ESMTPSA id 00721157ae682-7a370df16aasm59144037b3.40.2026.04.06.16.43.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Apr 2026 16:43:11 -0700 (PDT) From: Joshua Klinesmith To: linux-wireless@vger.kernel.org Cc: nbd@nbd.name, lorenzo@kernel.org, ryder.lee@mediatek.com, shayne.chen@mediatek.com, sean.wang@mediatek.com, linux-kernel@vger.kernel.org, Joshua Klinesmith , stable@vger.kernel.org Subject: [PATCH wireless 2/2] wifi: mt76: mt7996: clear cipher state on key removal for WED offload Date: Mon, 6 Apr 2026 19:42:04 -0400 Message-ID: <20260406234205.29857-3-joshuaklinesmith@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260406234205.29857-1-joshuaklinesmith@gmail.com> References: <20260406234205.29857-1-joshuaklinesmith@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Same issue as mt7915: link->mt76.cipher is set on key installation but never cleared on removal. The WA firmware retains the stale cipher in BSS_INFO, sets the protection bit on WED-offloaded frames, and drops all plaintext traffic when encryption is switched to open/none. Reset link->mt76.cipher to zero and call mt7996_mcu_add_bss_info() when the last group key is removed. Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices") Cc: stable@vger.kernel.org Signed-off-by: Joshua Klinesmith --- drivers/net/wireless/mediatek/mt76/mt7996/main.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/main.c b/drivers/net/wireless/mediatek/mt76/mt7996/main.c index 84f731b387..bf5fda6925 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/main.c @@ -235,6 +235,21 @@ mt7996_set_hw_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, } else { if (idx == *wcid_keyidx) *wcid_keyidx = -1; + + if (!sta && link->mt76.cipher) { + struct ieee80211_bss_conf *lc; + + lc = link_conf_dereference_protected(vif, + link_id); + if (!lc) + lc = &vif->bss_conf; + + link->mt76.cipher = 0; + mt7996_mcu_add_bss_info(link->phy, vif, lc, + &link->mt76, + msta_link, true); + } + continue; } -- 2.43.0