ath5k: fix tx status processing errors (causing packet loss and throughput issues)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 38396

package/kernel/mac80211/patches/300-pending_work.patch

@@ -9170,3 +9170,24 @@
  		    (ah->curchan->channel < caldata->channel) &&
  		    (ah->curchan->channel >= caldata->channel - 20))
  			return;
+--- a/drivers/net/wireless/ath/ath5k/base.c
++++ b/drivers/net/wireless/ath/ath5k/base.c
+@@ -1628,15 +1628,15 @@ ath5k_tx_frame_completed(struct ath5k_hw
+ 	ah->stats.tx_bytes_count += skb->len;
+ 	info = IEEE80211_SKB_CB(skb);
+ 
++	size = min_t(int, sizeof(info->status.rates), sizeof(bf->rates));
++	memcpy(info->status.rates, bf->rates, size);
++
+ 	tries[0] = info->status.rates[0].count;
+ 	tries[1] = info->status.rates[1].count;
+ 	tries[2] = info->status.rates[2].count;
+ 
+ 	ieee80211_tx_info_clear_status(info);
+ 
+-	size = min_t(int, sizeof(info->status.rates), sizeof(bf->rates));
+-	memcpy(info->status.rates, bf->rates, size);
+-
+ 	for (i = 0; i < ts->ts_final_idx; i++) {
+ 		struct ieee80211_tx_rate *r =
+ 			&info->status.rates[i];