Commit 7a532fe7 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville

ath9k_hw: fix interpretation of the rx KeyMiss flag

Documentation states that the KeyMiss flag is only valid if RxFrameOK is
unset, however empirical evidence has shown that this is false.
When KeyMiss is set (and RxFrameOK is 1), the hardware passes a valid frame
which has not been decrypted. The driver then falsely marks the frame
as decrypted, and when using CCMP this corrupts the rx CCMP PN, leading
to connection hangs.
Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Cc: stable@kernel.org
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 28e7d218
......@@ -557,10 +557,11 @@ int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs,
rxs->rs_status |= ATH9K_RXERR_DECRYPT;
else if (rxsp->status11 & AR_MichaelErr)
rxs->rs_status |= ATH9K_RXERR_MIC;
if (rxsp->status11 & AR_KeyMiss)
rxs->rs_status |= ATH9K_RXERR_KEYMISS;
}
if (rxsp->status11 & AR_KeyMiss)
rxs->rs_status |= ATH9K_RXERR_KEYMISS;
return 0;
}
EXPORT_SYMBOL(ath9k_hw_process_rxdesc_edma);
......
......@@ -618,10 +618,11 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
rs->rs_status |= ATH9K_RXERR_DECRYPT;
else if (ads.ds_rxstatus8 & AR_MichaelErr)
rs->rs_status |= ATH9K_RXERR_MIC;
if (ads.ds_rxstatus8 & AR_KeyMiss)
rs->rs_status |= ATH9K_RXERR_KEYMISS;
}
if (ads.ds_rxstatus8 & AR_KeyMiss)
rs->rs_status |= ATH9K_RXERR_KEYMISS;
return 0;
}
EXPORT_SYMBOL(ath9k_hw_rxprocdesc);
......
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