ALSA: ac97: 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/ac97/ac97_pcm.c

···
 					return err;
 			}
 	}
-	spin_lock_irq(&pcm->bus->bus_lock);
-	for (i = 3; i < 12; i++) {
-		if (!(slots & (1 << i)))
-			continue;
-		ok_flag = 0;
-		for (cidx = 0; cidx < 4; cidx++) {
-			if (bus->used_slots[pcm->stream][cidx] & (1 << i)) {
-				spin_unlock_irq(&pcm->bus->bus_lock);
-				err = -EBUSY;
+	scoped_guard(spinlock_irq, &pcm->bus->bus_lock) {
+		for (i = 3; i < 12; i++) {
+			if (!(slots & (1 << i)))
+				continue;
+			ok_flag = 0;
+			for (cidx = 0; cidx < 4; cidx++) {
+				if (bus->used_slots[pcm->stream][cidx] & (1 << i)) {
+					err = -EBUSY;
+					goto error;
+				}
+				if (pcm->r[r].rslots[cidx] & (1 << i)) {
+					bus->used_slots[pcm->stream][cidx] |= (1 << i);
+					ok_flag++;
+				}
+			}
+			if (!ok_flag) {
+				dev_err(bus->card->dev,
+					"cannot find configuration for AC97 slot %i\n",
+					i);
+				err = -EAGAIN;
 				goto error;
 			}
-			if (pcm->r[r].rslots[cidx] & (1 << i)) {
-				bus->used_slots[pcm->stream][cidx] |= (1 << i);
-				ok_flag++;
-			}
 		}
-		if (!ok_flag) {
-			spin_unlock_irq(&pcm->bus->bus_lock);
-			dev_err(bus->card->dev,
-				"cannot find configuration for AC97 slot %i\n",
-				i);
-			err = -EAGAIN;
-			goto error;
-		}
+		pcm->cur_dbl = r;
 	}
-	pcm->cur_dbl = r;
-	spin_unlock_irq(&pcm->bus->bus_lock);
 	for (i = 3; i < 12; i++) {
 		if (!(slots & (1 << i)))
 			continue;
···
 #endif
 
 	bus = pcm->bus;
-	spin_lock_irq(&pcm->bus->bus_lock);
+	guard(spinlock_irq)(&pcm->bus->bus_lock);
 	for (i = 3; i < 12; i++) {
 		if (!(slots & (1 << i)))
 			continue;
···
 	}
 	pcm->aslots = 0;
 	pcm->cur_dbl = 0;
-	spin_unlock_irq(&pcm->bus->bus_lock);
 	return 0;
 }