3 files changed, 15 insertions, 11 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 342edc543665..67df8644fef6 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -864,7 +864,7 @@ static inline u8 spectral_bitmap_weight(u8 *bins)
  * interface.
  */
 enum ath_fft_sample_type {
-	ATH_FFT_SAMPLE_HT20 = 0,
+	ATH_FFT_SAMPLE_HT20 = 1,
 };
 
 struct fft_sample_tlv {
@@ -876,7 +876,7 @@ struct fft_sample_tlv {
 struct fft_sample_ht20 {
 	struct fft_sample_tlv tlv;
 
-	u8 __alignment;
+	u8 max_exp;
 
 	u16 freq;
 	s8 rssi;
@@ -888,7 +888,7 @@ struct fft_sample_ht20 {
 
 	u64 tsf;
 
-	u16 data[SPECTRAL_HT20_NUM_BINS];
+	u8 data[SPECTRAL_HT20_NUM_BINS];
 } __packed;
 
 void ath9k_tasklet(unsigned long data);
diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 2bbdcf89d39a..3714b971d18e 100644
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -1236,11 +1236,13 @@ static int remove_buf_file_handler(struct dentry *dentry)
 void ath_debug_send_fft_sample(struct ath_softc *sc,
 			       struct fft_sample_tlv *fft_sample_tlv)
 {
+	int length;
 	if (!sc->rfs_chan_spec_scan)
 		return;
 
-	relay_write(sc->rfs_chan_spec_scan, fft_sample_tlv,
-		    fft_sample_tlv->length + sizeof(*fft_sample_tlv));
+	length = __be16_to_cpu(fft_sample_tlv->length) +
+		 sizeof(*fft_sample_tlv);
+	relay_write(sc->rfs_chan_spec_scan, fft_sample_tlv, length);
 }
 
 static struct rchan_callbacks rfs_spec_scan_cb = {
diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index 13ee37bcdb7d..2af6f19d2d2a 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -1035,7 +1035,7 @@ static int ath_process_fft(struct ath_softc *sc, struct ieee80211_hdr *hdr,
 	struct ath_radar_info *radar_info;
 	struct ath_ht20_mag_info *mag_info;
 	int len = rs->rs_datalen;
-	int i, dc_pos;
+	int dc_pos;
 
 	/* AR9280 and before report via ATH9K_PHYERR_RADAR, AR93xx and newer
 	 * via ATH9K_PHYERR_SPECTRAL. Haven't seen ATH9K_PHYERR_FALSE_RADAR_EXT
@@ -1064,8 +1064,9 @@ static int ath_process_fft(struct ath_softc *sc, struct ieee80211_hdr *hdr,
 
 	fft_sample.tlv.type = ATH_FFT_SAMPLE_HT20;
 	fft_sample.tlv.length = sizeof(fft_sample) - sizeof(fft_sample.tlv);
+	fft_sample.tlv.length = __cpu_to_be16(fft_sample.tlv.length);
 
-	fft_sample.freq = ah->curchan->chan->center_freq;
+	fft_sample.freq = __cpu_to_be16(ah->curchan->chan->center_freq);
 	fft_sample.rssi = fix_rssi_inv_only(rs->rs_rssi_ctl0);
 	fft_sample.noise = ah->noise;
 
@@ -1105,14 +1106,15 @@ static int ath_process_fft(struct ath_softc *sc, struct ieee80211_hdr *hdr,
 	/* mag data is at the end of the frame, in front of radar_info */
 	mag_info = ((struct ath_ht20_mag_info *)radar_info) - 1;
 
-	/* Apply exponent and grab further auxiliary information. */
-	for (i = 0; i < SPECTRAL_HT20_NUM_BINS; i++)
-		fft_sample.data[i] = bins[i] << mag_info->max_exp;
+	/* copy raw bins without scaling them */
+	memcpy(fft_sample.data, bins, SPECTRAL_HT20_NUM_BINS);
+	fft_sample.max_exp = mag_info->max_exp & 0xf;
 
 	fft_sample.max_magnitude = spectral_max_magnitude(mag_info->all_bins);
+	fft_sample.max_magnitude = __cpu_to_be16(fft_sample.max_magnitude);
 	fft_sample.max_index = spectral_max_index(mag_info->all_bins);
 	fft_sample.bitmap_weight = spectral_bitmap_weight(mag_info->all_bins);
-	fft_sample.tsf = tsf;
+	fft_sample.tsf = __cpu_to_be64(tsf);
 
 	ath_debug_send_fft_sample(sc, &fft_sample.tlv);
 	return 1;