1 files changed, 24 insertions, 18 deletions

diff --git a/sound/synth/emux/emux_effect.c b/sound/synth/emux/emux_effect.c
index afd119b11f39..bfe383fa90ba 100644
--- a/sound/synth/emux/emux_effect.c
+++ b/sound/synth/emux/emux_effect.c
@@ -168,7 +168,6 @@ snd_emux_send_effect(struct snd_emux_port *port, struct snd_midi_channel *chan,
 	unsigned char *srcp, *origp;
 	struct snd_emux *emu;
 	struct snd_emux_effect_table *fx;
-	unsigned long flags;
 
 	emu = port->emu;
 	fx = chan->private;
@@ -181,7 +180,10 @@ snd_emux_send_effect(struct snd_emux_port *port, struct snd_midi_channel *chan,
 	fx->flag[type] = mode;
 
 	/* do we need to modify the register in realtime ? */
-	if (! parm_defs[type].update || (offset = parm_defs[type].offset) < 0)
+	if (!parm_defs[type].update)
+		return;
+	offset = parm_defs[type].offset;
+	if (offset < 0)
 		return;
 
 #ifdef SNDRV_LITTLE_ENDIAN
@@ -192,22 +194,22 @@ snd_emux_send_effect(struct snd_emux_port *port, struct snd_midi_channel *chan,
 		offset++;
 #endif
 	/* modify the register values */
-	spin_lock_irqsave(&emu->voice_lock, flags);
-	for (i = 0; i < emu->max_voices; i++) {
-		struct snd_emux_voice *vp = &emu->voices[i];
-		if (!STATE_IS_PLAYING(vp->state) || vp->chan != chan)
-			continue;
-		srcp = (unsigned char*)&vp->reg.parm + offset;
-		origp = (unsigned char*)&vp->zone->v.parm + offset;
-		if (parm_defs[i].type & PARM_IS_BYTE) {
-			*srcp = *origp;
-			effect_set_byte(srcp, chan, type);
-		} else {
-			*(unsigned short*)srcp = *(unsigned short*)origp;
-			effect_set_word((unsigned short*)srcp, chan, type);
+	scoped_guard(spinlock_irqsave, &emu->voice_lock) {
+		for (i = 0; i < emu->max_voices; i++) {
+			struct snd_emux_voice *vp = &emu->voices[i];
+			if (!STATE_IS_PLAYING(vp->state) || vp->chan != chan)
+				continue;
+			srcp = (unsigned char *)&vp->reg.parm + offset;
+			origp = (unsigned char *)&vp->zone->v.parm + offset;
+			if (parm_defs[i].type & PARM_IS_BYTE) {
+				*srcp = *origp;
+				effect_set_byte(srcp, chan, type);
+			} else {
+				*(unsigned short *)srcp = *(unsigned short *)origp;
+				effect_set_word((unsigned short *)srcp, chan, type);
+			}
 		}
 	}
-	spin_unlock_irqrestore(&emu->voice_lock, flags);
 
 	/* activate them */
 	snd_emux_update_channel(port, chan, parm_defs[type].update);
@@ -223,13 +225,17 @@ snd_emux_setup_effect(struct snd_emux_voice *vp)
 	unsigned char *srcp;
 	int i;
 
-	if (! (fx = chan->private))
+	fx = chan->private;
+	if (!fx)
 		return;
 
 	/* modify the register values via effect table */
 	for (i = 0; i < EMUX_FX_END; i++) {
 		int offset;
-		if (! fx->flag[i] || (offset = parm_defs[i].offset) < 0)
+		if (!fx->flag[i])
+			continue;
+		offset = parm_defs[i].offset;
+		if (offset < 0)
 			continue;
 #ifdef SNDRV_LITTLE_ENDIAN
 		if (parm_defs[i].type & PARM_IS_ALIGN_HI)