ALSA: oxygen: Allocate resources with device-managed APIs

This patch converts the resource management in PCI oxygen drivers with
devres as a clean up.  Each manual resource management is converted
with the corresponding devres helper, and the page allocations are
done with the devres helper.

This should give no user-visible functional changes.

Link: https://lore.kernel.org/r/20210715075941.23332-44-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/oxygen/oxygen.c

@@ -854,7 +854,6 @@ static struct pci_driver oxygen_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = oxygen_ids,
 	.probe = generic_oxygen_probe,
-	.remove = oxygen_pci_remove,
 #ifdef CONFIG_PM_SLEEP
 	.driver = {
 		.pm = &oxygen_pci_pm,

sound/pci/oxygen/oxygen.h

@@ -161,7 +161,6 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
 				      const struct pci_device_id *id
 				     )
 		    );
-void oxygen_pci_remove(struct pci_dev *pci);
 #ifdef CONFIG_PM_SLEEP
 extern const struct dev_pm_ops oxygen_pci_pm;
 #endif

sound/pci/oxygen/oxygen_lib.c

@@ -570,15 +570,10 @@ static void oxygen_card_free(struct snd_card *card)
 	struct oxygen *chip = card->private_data;
 
 	oxygen_shutdown(chip);
-	if (chip->irq >= 0)
-		free_irq(chip->irq, chip);
 	flush_work(&chip->spdif_input_bits_work);
 	flush_work(&chip->gpio_work);
 	chip->model.cleanup(chip);
-	kfree(chip->model_data);
 	mutex_destroy(&chip->mutex);
-	pci_release_regions(chip->pci);
-	pci_disable_device(chip->pci);
 }
 
 int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
@@ -594,7 +589,7 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
 	const struct pci_device_id *pci_id;
 	int err;
 
-	err = snd_card_new(&pci->dev, index, id, owner,
+	err = snd_devm_card_new(&pci->dev, index, id, owner,
 				sizeof(*chip), &card);
 	if (err < 0)
 		return err;
@@ -610,41 +605,38 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
 	INIT_WORK(&chip->gpio_work, oxygen_gpio_changed);
 	init_waitqueue_head(&chip->ac97_waitqueue);
 
-	err = pci_enable_device(pci);
+	err = pcim_enable_device(pci);
 	if (err < 0)
-		goto err_card;
+		return err;
 
 	err = pci_request_regions(pci, DRIVER);
 	if (err < 0) {
 		dev_err(card->dev, "cannot reserve PCI resources\n");
-		goto err_pci_enable;
+		return err;
 	}
 
 	if (!(pci_resource_flags(pci, 0) & IORESOURCE_IO) ||
 	    pci_resource_len(pci, 0) < OXYGEN_IO_SIZE) {
 		dev_err(card->dev, "invalid PCI I/O range\n");
-		err = -ENXIO;
-		goto err_pci_regions;
+		return -ENXIO;
 	}
 	chip->addr = pci_resource_start(pci, 0);
 
 	pci_id = oxygen_search_pci_id(chip, ids);
-	if (!pci_id) {
-		err = -ENODEV;
-		goto err_pci_regions;
-	}
+	if (!pci_id)
+		return -ENODEV;
+
 	oxygen_restore_eeprom(chip, pci_id);
 	err = get_model(chip, pci_id);
 	if (err < 0)
-		goto err_pci_regions;
+		return err;
 
 	if (chip->model.model_data_size) {
-		chip->model_data = kzalloc(chip->model.model_data_size,
+		chip->model_data = devm_kzalloc(&pci->dev,
+						chip->model.model_data_size,
 						GFP_KERNEL);
-		if (!chip->model_data) {
-			err = -ENOMEM;
-			goto err_pci_regions;
-		}
+		if (!chip->model_data)
+			return -ENOMEM;
 	}
 
 	pci_set_master(pci);
@@ -654,11 +646,11 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
 	oxygen_init(chip);
 	chip->model.init(chip);
 
-	err = request_irq(pci->irq, oxygen_interrupt, IRQF_SHARED,
-			  KBUILD_MODNAME, chip);
+	err = devm_request_irq(&pci->dev, pci->irq, oxygen_interrupt,
+			       IRQF_SHARED, KBUILD_MODNAME, chip);
 	if (err < 0) {
 		dev_err(card->dev, "cannot grab interrupt %d\n", pci->irq);
-		goto err_card;
+		return err;
 	}
 	chip->irq = pci->irq;
 	card->sync_irq = chip->irq;
@@ -672,11 +664,11 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
 
 	err = oxygen_pcm_init(chip);
 	if (err < 0)
-		goto err_card;
+		return err;
 
 	err = oxygen_mixer_init(chip);
 	if (err < 0)
-		goto err_card;
+		return err;
 
 	if (chip->model.device_config & (MIDI_OUTPUT | MIDI_INPUT)) {
 		unsigned int info_flags =
@@ -689,7 +681,7 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
 					  chip->addr + OXYGEN_MPU401,
 					  info_flags, -1, &chip->midi);
 		if (err < 0)
-			goto err_card;
+			return err;
 	}
 
 	oxygen_proc_init(chip);
@@ -704,27 +696,13 @@ int oxygen_pci_probe(struct pci_dev *pci, int index, char *id,
 
 	err = snd_card_register(card);
 	if (err < 0)
-		goto err_card;
+		return err;
 
 	pci_set_drvdata(pci, card);
 	return 0;
-
-err_pci_regions:
-	pci_release_regions(pci);
-err_pci_enable:
-	pci_disable_device(pci);
-err_card:
-	snd_card_free(card);
-	return err;
 }
 EXPORT_SYMBOL(oxygen_pci_probe);
 
-void oxygen_pci_remove(struct pci_dev *pci)
-{
-	snd_card_free(pci_get_drvdata(pci));
-}
-EXPORT_SYMBOL(oxygen_pci_remove);
-
 #ifdef CONFIG_PM_SLEEP
 static int oxygen_pci_suspend(struct device *dev)
 {

sound/pci/oxygen/se6x.c

@@ -137,7 +137,6 @@ static struct pci_driver se6x_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = se6x_ids,
 	.probe = se6x_probe,
-	.remove = oxygen_pci_remove,
 #ifdef CONFIG_PM_SLEEP
 	.driver = {
 		.pm = &oxygen_pci_pm,

sound/pci/oxygen/virtuoso.c

@@ -82,7 +82,6 @@ static struct pci_driver xonar_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = xonar_ids,
 	.probe = xonar_probe,
-	.remove = oxygen_pci_remove,
 #ifdef CONFIG_PM_SLEEP
 	.driver = {
 		.pm = &oxygen_pci_pm,