ath9k_htc: process rx spectral packets

use code provided by Ashish Patro <[e-mail]>

Signed-off-by: Oleksij Rempel <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

drivers/net/wireless/ath/ath9k/htc_drv_txrx.c

···
 	 * separately to avoid doing two lookups for a rate for each frame.
 	 */
 	hdr = (struct ieee80211_hdr *)skb->data;
+
+	/*
+	 * Process PHY errors and return so that the packet
+	 * can be dropped.
+	 */
+	if (rx_stats.rs_status & ATH9K_RXERR_PHY) {
+		/* TODO: Not using DFS processing now. */
+		if (ath_cmn_process_fft(&priv->spec_priv, hdr,
+				    &rx_stats, rx_status->mactime)) {
+			/* TODO: Code to collect spectral scan statistics */
+		}
+		goto rx_next;
+	}
+
 	if (!ath9k_cmn_rx_accept(common, hdr, rx_status, &rx_stats,
 			&decrypt_error, priv->rxfilter))
 		goto rx_next;