[020/289] ath9k_hw: handle rx key miss

[Greg KH]

2.6.36-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Felix Fietkau <nbd@xxxxxxxxxxx>

commit 3ae74c33c4f799f6bf6d67240a94a0814a8f1944 upstream.

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@xxxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/net/wireless/ath/ath9k/ar9003_mac.c |    3 ++-
 drivers/net/wireless/ath/ath9k/mac.c        |    2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
@@ -616,7 +616,8 @@ int ath9k_hw_process_rxdesc_edma(struct
 			rxs->rs_status |= ATH9K_RXERR_DECRYPT;
 		} else if (rxsp->status11 & AR_MichaelErr) {
 			rxs->rs_status |= ATH9K_RXERR_MIC;
-		}
+		} else if (rxsp->status11 & AR_KeyMiss)
+			rxs->rs_status |= ATH9K_RXERR_DECRYPT;
 	}
 
 	return 0;
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -713,6 +713,8 @@ int ath9k_hw_rxprocdesc(struct ath_hw *a
 			rs->rs_status |= ATH9K_RXERR_DECRYPT;
 		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;
 	}
 
 	return 0;


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