ALSA: es1938: Use guard() for spin locks

Clean up the code using guard() for spin locks.

Merely code refactoring, and no behavior change.

Signed-off-by: Takashi Iwai <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

sound/pci/es1938.c

···
  * -----------------------------------------------------------------*/
 static void snd_es1938_mixer_write(struct es1938 *chip, unsigned char reg, unsigned char val)
 {
-	unsigned long flags;
-	spin_lock_irqsave(&chip->mixer_lock, flags);
+	guard(spinlock_irqsave)(&chip->mixer_lock);
 	outb(reg, SLSB_REG(chip, MIXERADDR));
 	outb(val, SLSB_REG(chip, MIXERDATA));
-	spin_unlock_irqrestore(&chip->mixer_lock, flags);
 	dev_dbg(chip->card->dev, "Mixer reg %02x set to %02x\n", reg, val);
 }
 
···
 static int snd_es1938_mixer_read(struct es1938 *chip, unsigned char reg)
 {
 	int data;
-	unsigned long flags;
-	spin_lock_irqsave(&chip->mixer_lock, flags);
+
+	guard(spinlock_irqsave)(&chip->mixer_lock);
 	outb(reg, SLSB_REG(chip, MIXERADDR));
 	data = inb(SLSB_REG(chip, MIXERDATA));
-	spin_unlock_irqrestore(&chip->mixer_lock, flags);
 	dev_dbg(chip->card->dev, "Mixer reg %02x now is %02x\n", reg, data);
 	return data;
 }
···
 static int snd_es1938_mixer_bits(struct es1938 *chip, unsigned char reg,
 				 unsigned char mask, unsigned char val)
 {
-	unsigned long flags;
 	unsigned char old, new, oval;
-	spin_lock_irqsave(&chip->mixer_lock, flags);
+
+	guard(spinlock_irqsave)(&chip->mixer_lock);
 	outb(reg, SLSB_REG(chip, MIXERADDR));
 	old = inb(SLSB_REG(chip, MIXERDATA));
 	oval = old & mask;
···
 			"Mixer reg %02x was %02x, set to %02x\n",
 			   reg, old, new);
 	}
-	spin_unlock_irqrestore(&chip->mixer_lock, flags);
 	return oval;
 }
 
···
  * -----------------------------------------------------------------*/
 static void snd_es1938_write(struct es1938 *chip, unsigned char reg, unsigned char val)
 {
-	unsigned long flags;
-	spin_lock_irqsave(&chip->reg_lock, flags);
+	guard(spinlock_irqsave)(&chip->reg_lock);
 	snd_es1938_write_cmd(chip, reg);
 	snd_es1938_write_cmd(chip, val);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
 	dev_dbg(chip->card->dev, "Reg %02x set to %02x\n", reg, val);
 }
 
···
 static unsigned char snd_es1938_read(struct es1938 *chip, unsigned char reg)
 {
 	unsigned char val;
-	unsigned long flags;
-	spin_lock_irqsave(&chip->reg_lock, flags);
+
+	guard(spinlock_irqsave)(&chip->reg_lock);
 	snd_es1938_write_cmd(chip, ESS_CMD_READREG);
 	snd_es1938_write_cmd(chip, reg);
 	val = snd_es1938_get_byte(chip);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
 	dev_dbg(chip->card->dev, "Reg %02x now is %02x\n", reg, val);
 	return val;
 }
···
 static int snd_es1938_bits(struct es1938 *chip, unsigned char reg, unsigned char mask,
 			   unsigned char val)
 {
-	unsigned long flags;
 	unsigned char old, new, oval;
-	spin_lock_irqsave(&chip->reg_lock, flags);
+
+	guard(spinlock_irqsave)(&chip->reg_lock);
 	snd_es1938_write_cmd(chip, ESS_CMD_READREG);
 	snd_es1938_write_cmd(chip, reg);
 	old = snd_es1938_get_byte(chip);
···
 		dev_dbg(chip->card->dev, "Reg %02x was %02x, set to %02x\n",
 			   reg, old, new);
 	}
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
 	return oval;
 }