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ath9k_hw: partially revert "fix dma descriptor rx error bit parsing" 

The rx error bit parsing was changed to consider PHY errors and various
decryption errors separately. While correct according to the documentation,
this is causing spurious decryption error reports in some situations.

Fix this by restoring the original order of the checks in those places,
where the errors are meant to be mutually exclusive.

If a CRC error is reported, then MIC failure and decryption errors
are irrelevant, and a PHY error is unlikely.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2011-01-14 00:06:27 +01:00 committed by John W. Linville
parent df6ba5d80d
commit 115dad7a7f
2 changed files with 14 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/wireless/ath/ath9k/ar9003_mac.c
View File

@ -615,7 +615,7 @@ int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs,
*/
if (rxsp->status11 & AR_CRCErr)
rxs->rs_status |= ATH9K_RXERR_CRC;
if (rxsp->status11 & AR_PHYErr) {
else if (rxsp->status11 & AR_PHYErr) {
phyerr = MS(rxsp->status11, AR_PHYErrCode);
/*
* If we reach a point here where AR_PostDelimCRCErr is
@ -638,11 +638,11 @@ int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs,
rxs->rs_phyerr = phyerr;
}
}
if (rxsp->status11 & AR_DecryptCRCErr)
} else if (rxsp->status11 & AR_DecryptCRCErr)
rxs->rs_status |= ATH9K_RXERR_DECRYPT;
if (rxsp->status11 & AR_MichaelErr)
else if (rxsp->status11 & AR_MichaelErr)
rxs->rs_status |= ATH9K_RXERR_MIC;
if (rxsp->status11 & AR_KeyMiss)
rxs->rs_status |= ATH9K_RXERR_DECRYPT;
}

14
drivers/net/wireless/ath/ath9k/mac.c
View File

@ -690,17 +690,23 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
rs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;
if ((ads.ds_rxstatus8 & AR_RxFrameOK) == 0) {
/*
* Treat these errors as mutually exclusive to avoid spurious
* extra error reports from the hardware. If a CRC error is
* reported, then decryption and MIC errors are irrelevant,
* the frame is going to be dropped either way
*/
if (ads.ds_rxstatus8 & AR_CRCErr)
rs->rs_status |= ATH9K_RXERR_CRC;
if (ads.ds_rxstatus8 & AR_PHYErr) {
else if (ads.ds_rxstatus8 & AR_PHYErr) {
rs->rs_status |= ATH9K_RXERR_PHY;
phyerr = MS(ads.ds_rxstatus8, AR_PHYErrCode);
rs->rs_phyerr = phyerr;
}
if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
} else if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
rs->rs_status |= ATH9K_RXERR_DECRYPT;
if (ads.ds_rxstatus8 & AR_MichaelErr)
else if (ads.ds_rxstatus8 & AR_MichaelErr)
rs->rs_status |= ATH9K_RXERR_MIC;
if (ads.ds_rxstatus8 & AR_KeyMiss)
rs->rs_status |= ATH9K_RXERR_DECRYPT;
}