ath9k: Add pktlog support

chromeos/compat-wireless/drivers/net/wireless/ath/ath9k/recv.c

Index: chromeos/compat-wireless/drivers/net/wireless/ath/ath9k/recv.c
diff --git a/chromeos/compat-wireless/drivers/net/wireless/ath/ath9k/recv.c b/chromeos/compat-wireless/drivers/net/wireless/ath/ath9k/recv.c
index c7b14b2b279efdcd2dae3e86faeccad0da4845a5..a7fdba03860fd714c98e6fc052961ede6a654aaf 100644
--- a/chromeos/compat-wireless/drivers/net/wireless/ath/ath9k/recv.c
+++ b/chromeos/compat-wireless/drivers/net/wireless/ath/ath9k/recv.c
@@ -1082,6 +1082,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 	struct ieee80211_rx_status *rxs;
 	struct ath_hw *ah = sc->sc_ah;
 	struct ath_common *common = ath9k_hw_common(ah);
+	u32 *rx_desc = NULL;
 	/*
 	 * The hw can techncically differ from common->hw when using ath9k
 	 * virtual wiphy so to account for that we iterate over the active
@@ -1174,12 +1175,24 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 				 dma_type);
 
 		skb_put(skb, rs.rs_datalen + ah->caps.rx_status_len);
-		if (ah->caps.rx_status_len)
+		if (ah->caps.rx_status_len) {
+			rx_desc = kzalloc(ah->caps.rx_status_len, GFP_ATOMIC);
+			if (rx_desc == NULL)
+				BUG_ON(1);
+			memcpy(rx_desc, skb->data, ah->caps.rx_status_len);
 			skb_pull(skb, ah->caps.rx_status_len);
+		}
 
 		ath9k_rx_skb_postprocess(common, skb, &rs,
 					 rxs, decrypt_error);
 
+		if (rx_desc) {
+			ath_pktlog_rx(sc, (void *) rx_desc, skb);
+			kfree(rx_desc);
+		} else {
+			ath_pktlog_rx(sc, bf->bf_desc, skb);
+		}
+
 		/* We will now give hardware our shiny new allocated skb */
 		bf->bf_mpdu = requeue_skb;
 		bf->bf_buf_addr = dma_map_single(sc->dev, requeue_skb->data,