Commit-ID: dc1580ddfc1f70636f6ef80a385902f7e8278deb Gitweb: http://git.kernel.org/tip/dc1580ddfc1f70636f6ef80a385902f7e8278deb Author: Johannes Berg <johannes.berg@xxxxxxxxx> AuthorDate: Tue, 10 Aug 2010 09:46:40 +0200 Committer: John W. Linville <linville@xxxxxxxxxxxxx> CommitDate: Mon, 16 Aug 2010 16:45:21 -0400 mac80211: remove unused status flag checks The decryption code verifies whether or not a given frame was decrypted and verified by hardware. This is unnecessary, as the crypto RX handler already does it long before the decryption code is even invoked, so remove that code to avoid confusion. Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx> --- net/mac80211/rx.c | 3 +++ net/mac80211/wpa.c | 26 ++++++-------------------- 2 files changed, 9 insertions(+), 20 deletions(-) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index ad24270..4fdbed5 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -899,6 +899,9 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) if (!is_multicast_ether_addr(hdr->addr1) && stakey) { rx->key = stakey; + if ((status->flag & RX_FLAG_DECRYPTED) && + (status->flag & RX_FLAG_IV_STRIPPED)) + return RX_CONTINUE; /* Skip decryption if the frame is not protected. */ if (!ieee80211_has_protected(fc)) return RX_CONTINUE; diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index b08ad94..43882b3 100644 --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -221,19 +221,13 @@ ieee80211_crypto_tkip_decrypt(struct ieee80211_rx_data *rx) if (!rx->sta || skb->len - hdrlen < 12) return RX_DROP_UNUSABLE; - if (status->flag & RX_FLAG_DECRYPTED) { - if (status->flag & RX_FLAG_IV_STRIPPED) { - /* - * Hardware took care of all processing, including - * replay protection, and stripped the ICV/IV so - * we cannot do any checks here. - */ - return RX_CONTINUE; - } - - /* let TKIP code verify IV, but skip decryption */ + /* + * Let TKIP code verify IV, but skip decryption. + * In the case where hardware checks the IV as well, + * we don't even get here, see ieee80211_rx_h_decrypt() + */ + if (status->flag & RX_FLAG_DECRYPTED) hwaccel = 1; - } res = ieee80211_tkip_decrypt_data(rx->local->wep_rx_tfm, key, skb->data + hdrlen, @@ -447,10 +441,6 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx) if (!rx->sta || data_len < 0) return RX_DROP_UNUSABLE; - if ((status->flag & RX_FLAG_DECRYPTED) && - (status->flag & RX_FLAG_IV_STRIPPED)) - return RX_CONTINUE; - ccmp_hdr2pn(pn, skb->data + hdrlen); queue = ieee80211_is_mgmt(hdr->frame_control) ? @@ -564,10 +554,6 @@ ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx) if (!ieee80211_is_mgmt(hdr->frame_control)) return RX_CONTINUE; - if ((status->flag & RX_FLAG_DECRYPTED) && - (status->flag & RX_FLAG_IV_STRIPPED)) - return RX_CONTINUE; - if (skb->len < 24 + sizeof(*mmie)) return RX_DROP_UNUSABLE; -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html