ath9k_hw: handle rx key miss

If AR_KeyMiss is set in the rx descriptor and AR_RxFrameOK is unset,
the hardware could not locate a valid key during a decryption attempt.

In this case, the frame must not be reported as decrypted, otherwise
mac80211 sees only random garbage.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 0b7d1253f0c0..3efda8a8a3c1 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -714,6 +714,8 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
                 else if ((ads.ds_rxstatus8 & AR_MichaelErr) &&
                          rs->rs_keyix != ATH9K_RXKEYIX_INVALID)
                         rs->rs_status |= ATH9K_RXERR_MIC;
+                else if (ads.ds_rxstatus8 & AR_KeyMiss)
+                        rs->rs_status |= ATH9K_RXERR_DECRYPT;
         }
 
         return 0;