ALSA: emu10k1: merge common paths in snd_emu10k1_ptr_{read,write}()

Avoids some code duplication.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230514170323.3408798-3-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/emu10k1/io.c

@@ -40,6 +40,11 @@ unsigned int snd_emu10k1_ptr_read(struct snd_emu10k1 * emu, unsigned int reg, un
 	if (!check_ptr_reg(emu, regptr))
 		return 0;
 
+	spin_lock_irqsave(&emu->emu_lock, flags);
+	outl(regptr, emu->port + PTR);
+	val = inl(emu->port + DATA);
+	spin_unlock_irqrestore(&emu->emu_lock, flags);
+
 	if (reg & 0xff000000) {
 		unsigned char size, offset;
 		
@@ -47,17 +52,8 @@ unsigned int snd_emu10k1_ptr_read(struct snd_emu10k1 * emu, unsigned int reg, un
 		offset = (reg >> 16) & 0x1f;
 		mask = ((1 << size) - 1) << offset;
 		
-		spin_lock_irqsave(&emu->emu_lock, flags);
-		outl(regptr, emu->port + PTR);
-		val = inl(emu->port + DATA);
-		spin_unlock_irqrestore(&emu->emu_lock, flags);
-		
 		return (val & mask) >> offset;
 	} else {
-		spin_lock_irqsave(&emu->emu_lock, flags);
-		outl(regptr, emu->port + PTR);
-		val = inl(emu->port + DATA);
-		spin_unlock_irqrestore(&emu->emu_lock, flags);
 		return val;
 	}
 }
@@ -88,14 +84,12 @@ void snd_emu10k1_ptr_write(struct snd_emu10k1 *emu, unsigned int reg, unsigned i
 		spin_lock_irqsave(&emu->emu_lock, flags);
 		outl(regptr, emu->port + PTR);
 		data |= inl(emu->port + DATA) & ~mask;
-		outl(data, emu->port + DATA);
-		spin_unlock_irqrestore(&emu->emu_lock, flags);		
 	} else {
 		spin_lock_irqsave(&emu->emu_lock, flags);
 		outl(regptr, emu->port + PTR);
-		outl(data, emu->port + DATA);
-		spin_unlock_irqrestore(&emu->emu_lock, flags);
 	}
+	outl(data, emu->port + DATA);
+	spin_unlock_irqrestore(&emu->emu_lock, flags);
 }
 
 EXPORT_SYMBOL(snd_emu10k1_ptr_write);