diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index c996963ab339..8c13479b17cd 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -703,7 +703,8 @@ int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
 			rs->rs_phyerr = phyerr;
 		} else if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
 			rs->rs_status |= ATH9K_RXERR_DECRYPT;
-		else if (ads.ds_rxstatus8 & AR_MichaelErr)
+		else if ((ads.ds_rxstatus8 & AR_MichaelErr) &&
+		         rs->rs_keyix != ATH9K_RXKEYIX_INVALID)
 			rs->rs_status |= ATH9K_RXERR_MIC;
 		else if (ads.ds_rxstatus8 & AR_KeyMiss)
 			rs->rs_status |= ATH9K_RXERR_DECRYPT;
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index 14d479f8d8ac..1a62e351ec77 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -1049,11 +1049,9 @@ static void ath9k_rx_skb_postprocess(struct ath_common *common,
 	int hdrlen, padpos, padsize;
 	u8 keyix;
 	__le16 fc;
-	bool is_mc;
 
 	/* see if any padding is done by the hw and remove it */
 	hdr = (struct ieee80211_hdr *) skb->data;
-	is_mc = !!is_multicast_ether_addr(hdr->addr1);
 	hdrlen = ieee80211_get_hdrlen_from_skb(skb);
 	fc = hdr->frame_control;
 	padpos = ath9k_cmn_padpos(hdr->frame_control);
@@ -1074,7 +1072,7 @@ static void ath9k_rx_skb_postprocess(struct ath_common *common,
 
 	keyix = rx_stats->rs_keyix;
 
-	if ((is_mc || !(keyix == ATH9K_RXKEYIX_INVALID)) && !decrypt_error &&
+	if (!(keyix == ATH9K_RXKEYIX_INVALID) && !decrypt_error &&
 	    ieee80211_has_protected(fc)) {
 		rxs->flag |= RX_FLAG_DECRYPTED;
 	} else if (ieee80211_has_protected(fc)