rt2x00: Fix TX status reporting

Not all values of the TX status enumeration were
covered during updating of the TX statistics. This
could lead to wrong bitrate tuning but also wrong
behavior in tools like hostapd.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00dev.c

@@ -206,6 +206,7 @@ void rt2x00lib_txdone(struct queue_entry *entry,
 	unsigned int header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
 	u8 rate_idx, rate_flags, retry_rates;
 	unsigned int i;
+	bool success;
 
 	/*
 	 * Unmap the skb.
@@ -234,13 +235,18 @@ void rt2x00lib_txdone(struct queue_entry *entry,
 	rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
 
 	/*
-	 * Update TX statistics.
+	 * Determine if the frame has been successfully transmitted.
 	 */
-	rt2x00dev->link.qual.tx_success +=
+	success =
 	    test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
-	    test_bit(TXDONE_UNKNOWN, &txdesc->flags);
-	rt2x00dev->link.qual.tx_failed +=
-	    test_bit(TXDONE_FAILURE, &txdesc->flags);
+	    test_bit(TXDONE_UNKNOWN, &txdesc->flags) ||
+	    test_bit(TXDONE_FALLBACK, &txdesc->flags);
+
+	/*
+	 * Update TX statistics.
+	 */
+	rt2x00dev->link.qual.tx_success += success;
+	rt2x00dev->link.qual.tx_failed += !success;
 
 	rate_idx = skbdesc->tx_rate_idx;
 	rate_flags = skbdesc->tx_rate_flags;
@@ -263,22 +269,20 @@ void rt2x00lib_txdone(struct queue_entry *entry,
 		tx_info->status.rates[i].flags = rate_flags;
 		tx_info->status.rates[i].count = 1;
 	}
-	if (i < (IEEE80211_TX_MAX_RATES -1))
+	if (i < (IEEE80211_TX_MAX_RATES - 1))
 		tx_info->status.rates[i].idx = -1; /* terminate */
 
 	if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
-		if (test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
-				test_bit(TXDONE_UNKNOWN, &txdesc->flags))
+		if (success)
 			tx_info->flags |= IEEE80211_TX_STAT_ACK;
-		else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
+		else
 			rt2x00dev->low_level_stats.dot11ACKFailureCount++;
 	}
 
 	if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
-		if (test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
-				test_bit(TXDONE_UNKNOWN, &txdesc->flags))
+		if (success)
 			rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
-		else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
+		else
 			rt2x00dev->low_level_stats.dot11RTSFailureCount++;
 	}