ath9k: Fix STA disconnect issue due to received MIC failed bcast frames

AR_RxKeyIdxValid will not be set for bcast/mcast frames and so relying
this status for MIC failed frames is buggy.

Due to this, MIC failure events for broadcast frames are not sent to
supplicant resulted in AP disconnecting the STA.

Able to pass Wifi Test case 5.2.18 with this fix.

Cc: Stable <stable@kernel.org> (2.6.36+)
Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 8c13479b17cd9d418f7d7f496b01dbf7445ba202..c996963ab33927c027f3fb019200261c0ac07d18 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -703,8 +703,7 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
                        rs->rs_phyerr = phyerr;
                } else if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
                        rs->rs_status |= ATH9K_RXERR_DECRYPT;
-               else if ((ads.ds_rxstatus8 & AR_MichaelErr) &&
-                        rs->rs_keyix != ATH9K_RXKEYIX_INVALID)
+               else if (ads.ds_rxstatus8 & AR_MichaelErr)
                        rs->rs_status |= ATH9K_RXERR_MIC;
                else if (ads.ds_rxstatus8 & AR_KeyMiss)
                        rs->rs_status |= ATH9K_RXERR_DECRYPT;

diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index 1a62e351ec77c217598a46fae7bdbcc84c1c6050..14d479f8d8ac010df11d8f00b0b8a721545aaa0f 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -1049,9 +1049,11 @@ static void ath9k_rx_skb_postprocess(struct ath_common *common,
        int hdrlen, padpos, padsize;
        u8 keyix;
        __le16 fc;
+       bool is_mc;
 
        /* see if any padding is done by the hw and remove it */
        hdr = (struct ieee80211_hdr *) skb->data;
+       is_mc = !!is_multicast_ether_addr(hdr->addr1);
        hdrlen = ieee80211_get_hdrlen_from_skb(skb);
        fc = hdr->frame_control;
        padpos = ath9k_cmn_padpos(hdr->frame_control);
@@ -1072,7 +1074,7 @@ static void ath9k_rx_skb_postprocess(struct ath_common *common,
 
        keyix = rx_stats->rs_keyix;
 
-       if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error &&
+       if ((is_mc || !(keyix == ATH9K_RXKEYIX_INVALID)) && !decrypt_error &&
            ieee80211_has_protected(fc)) {
                rxs->flag |= RX_FLAG_DECRYPTED;
        } else if (ieee80211_has_protected(fc)