From d216aaa674feb14a4aeb56bc3708f69d81c39d45 Mon Sep 17 00:00:00 2001 From: Jouni Malinen Date: Tue, 3 Mar 2009 13:11:53 +0200 Subject: [PATCH] ath9k: Clean up setkey operations There is no need to use ath_keyset() wrapper for ath9k_hw_set_keycache_entry() calls. In addition, improve the comments describing the key setting operations. Signed-off-by: Jouni Malinen Signed-off-by: John W. Linville --- drivers/net/wireless/ath9k/main.c | 42 ++++++++++++------------------- 1 file changed, 16 insertions(+), 26 deletions(-) diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c index d5b0035e9b9..b7a3523e6ed 100644 --- a/drivers/net/wireless/ath9k/main.c +++ b/drivers/net/wireless/ath9k/main.c @@ -638,17 +638,6 @@ static u32 ath_get_extchanmode(struct ath_softc *sc, return chanmode; } -static int ath_keyset(struct ath_softc *sc, u16 keyix, - struct ath9k_keyval *hk, const u8 mac[ETH_ALEN]) -{ - bool status; - - status = ath9k_hw_set_keycache_entry(sc->sc_ah, - keyix, hk, mac); - - return status != false; -} - static int ath_setkey_tkip(struct ath_softc *sc, u16 keyix, const u8 *key, struct ath9k_keyval *hk, const u8 *addr, bool authenticator) @@ -660,7 +649,11 @@ static int ath_setkey_tkip(struct ath_softc *sc, u16 keyix, const u8 *key, key_rxmic = key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY; if (addr == NULL) { - /* Group key installation */ + /* + * Group key installation - only two key cache entries are used + * regardless of splitmic capability since group key is only + * used either for TX or RX. + */ if (authenticator) { memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic)); memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_mic)); @@ -668,24 +661,21 @@ static int ath_setkey_tkip(struct ath_softc *sc, u16 keyix, const u8 *key, memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); memcpy(hk->kv_txmic, key_rxmic, sizeof(hk->kv_mic)); } - return ath_keyset(sc, keyix, hk, addr); + return ath9k_hw_set_keycache_entry(sc->sc_ah, keyix, hk, addr); } if (!sc->splitmic) { - /* - * data key goes at first index, - * the hal handles the MIC keys at index+64. - */ + /* TX and RX keys share the same key cache entry. */ memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic)); - return ath_keyset(sc, keyix, hk, addr); + return ath9k_hw_set_keycache_entry(sc->sc_ah, keyix, hk, addr); } - /* - * TX key goes at first index, RX key at +32. - * The hal handles the MIC keys at index+64. - */ + + /* Separate key cache entries for TX and RX */ + + /* TX key goes at first index, RX key at +32. */ memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic)); - if (!ath_keyset(sc, keyix, hk, NULL)) { - /* Txmic entry failed. No need to proceed further */ + if (!ath9k_hw_set_keycache_entry(sc->sc_ah, keyix, hk, NULL)) { + /* TX MIC entry failed. No need to proceed further */ DPRINTF(sc, ATH_DBG_KEYCACHE, "Setting TX MIC Key Failed\n"); return 0; @@ -693,7 +683,7 @@ static int ath_setkey_tkip(struct ath_softc *sc, u16 keyix, const u8 *key, memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); /* XXX delete tx key on failure? */ - return ath_keyset(sc, keyix + 32, hk, addr); + return ath9k_hw_set_keycache_entry(sc->sc_ah, keyix + 32, hk, addr); } static int ath_reserve_key_cache_slot_tkip(struct ath_softc *sc) @@ -840,7 +830,7 @@ static int ath_key_config(struct ath_softc *sc, ret = ath_setkey_tkip(sc, idx, key->key, &hk, mac, vif->type == NL80211_IFTYPE_AP); else - ret = ath_keyset(sc, idx, &hk, mac); + ret = ath9k_hw_set_keycache_entry(sc->sc_ah, idx, &hk, mac); if (!ret) return -EIO; -- 2.41.1