ALSA: fireworks/bebob: Shorten critical section for stream_stop_duplex()

All assignment for local variables in these functions are not related to
critical section.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/bebob/bebob_stream.c

@@ -655,8 +655,6 @@ void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)
 	struct amdtp_stream *master, *slave;
 	atomic_t *master_substreams, *slave_substreams;
 
-	mutex_lock(&bebob->mutex);
-
 	if (bebob->master == &bebob->rx_stream) {
 		slave  = &bebob->tx_stream;
 		master = &bebob->rx_stream;
@@ -669,6 +667,8 @@ void snd_bebob_stream_stop_duplex(struct snd_bebob *bebob)
 		master_substreams = &bebob->capture_substreams;
 	}
 
+	mutex_lock(&bebob->mutex);
+
 	if (atomic_read(slave_substreams) == 0) {
 		amdtp_stream_pcm_abort(slave);
 		amdtp_stream_stop(slave);

sound/firewire/fireworks/fireworks_stream.c

@@ -284,8 +284,6 @@ void snd_efw_stream_stop_duplex(struct snd_efw *efw)
 	struct amdtp_stream *master, *slave;
 	atomic_t *master_substreams, *slave_substreams;
 
-	mutex_lock(&efw->mutex);
-
 	if (efw->master == &efw->rx_stream) {
 		slave  = &efw->tx_stream;
 		master = &efw->rx_stream;
@@ -298,6 +296,8 @@ void snd_efw_stream_stop_duplex(struct snd_efw *efw)
 		master_substreams = &efw->capture_substreams;
 	}
 
+	mutex_lock(&efw->mutex);
+
 	if (atomic_read(slave_substreams) == 0) {
 		stop_stream(efw, slave);