mac80211: make CALL_TXH a statement

The multi-line code in this macro wasn't wrapped
in do {} while (0) so we cannot use it in an if()
branch safely in the future -- fix that.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/tx.c

@@ -1201,22 +1201,24 @@ static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
 	ieee80211_tx_result res = TX_DROP;
 
 #define CALL_TXH(txh) \
+	do {				\
 		res = txh(tx);		\
 		if (res != TX_CONTINUE)	\
-		goto txh_done;
+			goto txh_done;	\
+	} while (0)
 
-	CALL_TXH(ieee80211_tx_h_check_assoc)
-	CALL_TXH(ieee80211_tx_h_ps_buf)
-	CALL_TXH(ieee80211_tx_h_select_key)
-	CALL_TXH(ieee80211_tx_h_michael_mic_add)
-	CALL_TXH(ieee80211_tx_h_rate_ctrl)
-	CALL_TXH(ieee80211_tx_h_misc)
-	CALL_TXH(ieee80211_tx_h_sequence)
-	CALL_TXH(ieee80211_tx_h_fragment)
+	CALL_TXH(ieee80211_tx_h_check_assoc);
+	CALL_TXH(ieee80211_tx_h_ps_buf);
+	CALL_TXH(ieee80211_tx_h_select_key);
+	CALL_TXH(ieee80211_tx_h_michael_mic_add);
+	CALL_TXH(ieee80211_tx_h_rate_ctrl);
+	CALL_TXH(ieee80211_tx_h_misc);
+	CALL_TXH(ieee80211_tx_h_sequence);
+	CALL_TXH(ieee80211_tx_h_fragment);
 	/* handlers after fragment must be aware of tx info fragmentation! */
-	CALL_TXH(ieee80211_tx_h_stats)
-	CALL_TXH(ieee80211_tx_h_encrypt)
-	CALL_TXH(ieee80211_tx_h_calculate_duration)
+	CALL_TXH(ieee80211_tx_h_stats);
+	CALL_TXH(ieee80211_tx_h_encrypt);
+	CALL_TXH(ieee80211_tx_h_calculate_duration);
 #undef CALL_TXH
 
  txh_done: