From f96e65476acec4600c2561187e2b60765a1d271c Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Mon, 22 Mar 2021 21:39:57 +0100 Subject: [PATCH] mt76: mt7915: fix key set/delete issue [ Upstream commit 1da4fd48d28436f8b690cdc2879603dede6d8355 ] Deleting a key with the previous key index deletes the current key Rework the code to better keep track of multiple keys and check for the key index before deleting the current key Signed-off-by: Felix Fietkau Signed-off-by: Sasha Levin --- .../net/wireless/mediatek/mt76/mt7915/main.c | 25 +++++++++++++------ 1 file changed, 18 insertions(+), 7 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c index 0721e9d85b655..2f3527179b7d6 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c @@ -314,7 +314,9 @@ static int mt7915_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct mt7915_sta *msta = sta ? (struct mt7915_sta *)sta->drv_priv : &mvif->sta; struct mt76_wcid *wcid = &msta->wcid; + u8 *wcid_keyidx = &wcid->hw_key_idx; int idx = key->keyidx; + int err = 0; /* The hardware does not support per-STA RX GTK, fallback * to software mode for these. @@ -329,6 +331,7 @@ static int mt7915_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, /* fall back to sw encryption for unsupported ciphers */ switch (key->cipher) { case WLAN_CIPHER_SUITE_AES_CMAC: + wcid_keyidx = &wcid->hw_key_idx2; key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIE; break; case WLAN_CIPHER_SUITE_TKIP: @@ -344,16 +347,24 @@ static int mt7915_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, return -EOPNOTSUPP; } - if (cmd == SET_KEY) { - key->hw_key_idx = wcid->idx; - wcid->hw_key_idx = idx; - } else if (idx == wcid->hw_key_idx) { - wcid->hw_key_idx = -1; - } + mutex_lock(&dev->mt76.mutex); + + if (cmd == SET_KEY) + *wcid_keyidx = idx; + else if (idx == *wcid_keyidx) + *wcid_keyidx = -1; + else + goto out; + mt76_wcid_key_setup(&dev->mt76, wcid, cmd == SET_KEY ? key : NULL); - return mt7915_mcu_add_key(dev, vif, msta, key, cmd); + err = mt7915_mcu_add_key(dev, vif, msta, key, cmd); + +out: + mutex_unlock(&dev->mt76.mutex); + + return err; } static int mt7915_config(struct ieee80211_hw *hw, u32 changed) -- 2.47.2