ALSA: als300: 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/als300.c

···
 	unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 	unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 	
-	spin_lock_irq(&chip->reg_lock);
+	guard(spinlock_irq)(&chip->reg_lock);
 	tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 	tmp &= ~TRANSFER_START;
 
···
 					runtime->dma_addr);
 	snd_als300_gcr_write(chip->port, PLAYBACK_END,
 					runtime->dma_addr + buffer_bytes - 1);
-	spin_unlock_irq(&chip->reg_lock);
 	return 0;
 }
 
···
 	unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
 	unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 
-	spin_lock_irq(&chip->reg_lock);
+	guard(spinlock_irq)(&chip->reg_lock);
 	tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
 	tmp &= ~TRANSFER_START;
 
···
 					runtime->dma_addr);
 	snd_als300_gcr_write(chip->port, RECORD_END,
 					runtime->dma_addr + buffer_bytes - 1);
-	spin_unlock_irq(&chip->reg_lock);
 	return 0;
 }
 
···
 	data = substream->runtime->private_data;
 	reg = data->control_register;
 
-	spin_lock(&chip->reg_lock);
+	guard(spinlock)(&chip->reg_lock);
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
···
 		snd_als300_dbgplay("TRIGGER INVALID\n");
 		ret = -EINVAL;
 	}
-	spin_unlock(&chip->reg_lock);
 	return ret;
 }
 
···
 	data = substream->runtime->private_data;
 	period_bytes = snd_pcm_lib_period_bytes(substream);
 	
-	spin_lock(&chip->reg_lock);
-	current_ptr = (u16) snd_als300_gcr_read(chip->port,
-					data->block_counter_register) + 4;
-	spin_unlock(&chip->reg_lock);
+	scoped_guard(spinlock, &chip->reg_lock) {
+		current_ptr = (u16) snd_als300_gcr_read(chip->port,
+							data->block_counter_register) + 4;
+	}
 	if (current_ptr > period_bytes)
 		current_ptr = 0;
 	else
···
 
 static void snd_als300_init(struct snd_als300 *chip)
 {
-	unsigned long flags;
 	u32 tmp;
 	
-	spin_lock_irqsave(&chip->reg_lock, flags);
+	guard(spinlock_irqsave)(&chip->reg_lock);
 	chip->revision = (snd_als300_gcr_read(chip->port, MISC_CONTROL) >> 16)
 								& 0x0000000F;
 	/* Setup DRAM */
···
 	tmp = snd_als300_gcr_read(chip->port, PLAYBACK_CONTROL);
 	snd_als300_gcr_write(chip->port, PLAYBACK_CONTROL,
 			tmp & ~TRANSFER_START);
-	spin_unlock_irqrestore(&chip->reg_lock, flags);
 }
 
 static int snd_als300_create(struct snd_card *card,