---

yaml
---
r: 203713
b: refs/heads/master
c: 9171acc
h: refs/heads/master
i:
  203711: f0af2da
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 15804e3e9de52f1baefad34233424488b5672853
+refs/heads/master: 9171acc7e094b3ca88e624f39891a4f3bf9d083c

trunk/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) {