ath9k: fix PA predistortion training, fixes hang issues and most likely also fixes #12073

SVN-Revision: 33278

package/mac80211/patches/575-ath9k_fix_paprd_crash.patch

@@ -0,0 +1,58 @@
+--- a/drivers/net/wireless/ath/ath9k/hw.h
++++ b/drivers/net/wireless/ath/ath9k/hw.h
+@@ -404,6 +404,7 @@ struct ath9k_hw_cal_data {
+ 	int8_t iCoff;
+ 	int8_t qCoff;
+ 	bool rtt_done;
++	bool paprd_packet_sent;
+ 	bool paprd_done;
+ 	bool nfcal_pending;
+ 	bool nfcal_interference;
+--- a/drivers/net/wireless/ath/ath9k/hw.c
++++ b/drivers/net/wireless/ath/ath9k/hw.c
+@@ -1780,6 +1780,8 @@ int ath9k_hw_reset(struct ath_hw *ah, st
+ 		/* Operating channel changed, reset channel calibration data */
+ 		memset(caldata, 0, sizeof(*caldata));
+ 		ath9k_init_nfcal_hist_buffer(ah, chan);
++	} else if (caldata) {
++		caldata->paprd_packet_sent = false;
+ 	}
+ 	ah->noise = ath9k_hw_getchan_noise(ah, chan);
+ 
+--- a/drivers/net/wireless/ath/ath9k/xmit.c
++++ b/drivers/net/wireless/ath/ath9k/xmit.c
+@@ -2028,6 +2028,9 @@ static void ath_tx_complete(struct ath_s
+ 
+ 	ath_dbg(common, XMIT, "TX complete: skb: %p\n", skb);
+ 
++	if (sc->sc_ah->caldata)
++		sc->sc_ah->caldata->paprd_packet_sent = true;
++
+ 	if (!(tx_flags & ATH_TX_ERROR))
+ 		/* Frame was ACKed */
+ 		tx_info->flags |= IEEE80211_TX_STAT_ACK;
+--- a/drivers/net/wireless/ath/ath9k/link.c
++++ b/drivers/net/wireless/ath/ath9k/link.c
+@@ -256,7 +256,7 @@ void ath_paprd_calibrate(struct work_str
+ 	int len = 1800;
+ 	int ret;
+ 
+-	if (!caldata)
++	if (!caldata || !caldata->paprd_packet_sent || caldata->paprd_done)
+ 		return;
+ 
+ 	ath9k_ps_wakeup(sc);
+@@ -283,13 +283,6 @@ void ath_paprd_calibrate(struct work_str
+ 			continue;
+ 
+ 		chain_ok = 0;
+-
+-		ath_dbg(common, CALIBRATE,
+-			"Sending PAPRD frame for thermal measurement on chain %d\n",
+-			chain);
+-		if (!ath_paprd_send_frame(sc, skb, chain))
+-			goto fail_paprd;
+-
+ 		ar9003_paprd_setup_gain_table(ah, chain);
+ 
+ 		ath_dbg(common, CALIBRATE,