diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/ar9003_mac.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ar9003_mac.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mac.c b/drivers/net/wireless/ath/ath9k/ar9003_mac.c index 06ef710..5b995be 100644 --- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c @@ -579,12 +579,39 @@ int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs, rxs->rs_flags |= ATH9K_RX_DECRYPT_BUSY; if ((rxsp->status11 & AR_RxFrameOK) == 0) { + /* + * AR_CRCErr will bet set to true if we're on the last + * subframe and the AR_PostDelimCRCErr is caught. + * In a way this also gives us a guarantee that when + * (!(AR_CRCErr) && (AR_PostDelimCRCErr)) we cannot + * possibly be reviewing the last subframe. AR_CRCErr + * is the CRC of the actual data. + */ if (rxsp->status11 & AR_CRCErr) { rxs->rs_status |= ATH9K_RXERR_CRC; } else if (rxsp->status11 & AR_PHYErr) { - rxs->rs_status |= ATH9K_RXERR_PHY; phyerr = MS(rxsp->status11, AR_PHYErrCode); - rxs->rs_phyerr = phyerr; + /* + * If we reach a point here where AR_PostDelimCRCErr is + * true it implies we're *not* on the last subframe. In + * in that case that we know already that the CRC of + * the frame was OK, and MAC would send an ACK for that + * subframe, even if we did get a phy error of type + * ATH9K_PHYERR_OFDM_RESTART. This is only applicable + * to frame that are prior to the last subframe. + * The AR_PostDelimCRCErr is the CRC for the MPDU + * delimiter, which contains the 4 reserved bits, + * the MPDU length (12 bits), and follows the MPDU + * delimiter for an A-MPDU subframe (0x4E = 'N' ASCII). + */ + if ((phyerr == ATH9K_PHYERR_OFDM_RESTART) && + (rxsp->status11 & AR_PostDelimCRCErr)) { + rxs->rs_phyerr = 0; + } else { + rxs->rs_status |= ATH9K_RXERR_PHY; + rxs->rs_phyerr = phyerr; + } + } else if (rxsp->status11 & AR_DecryptCRCErr) { rxs->rs_status |= ATH9K_RXERR_DECRYPT; } else if (rxsp->status11 & AR_MichaelErr) { |