ALSA: lx6464es: Allocate resources with device-managed APIs

This patch converts the resource management in PCI lx6464es driver
with devres as a clean up.  Each manual resource management is
converted with the corresponding devres helper, and the card object
release is managed now via card->private_free instead of a lowlevel
snd_device.

This should give no user-visible functional changes.

Link: https://lore.kernel.org/r/20210715075941.23332-42-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/lx6464es/lx6464es.c

@@ -524,29 +524,11 @@ static int lx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 	return lx_pcm_trigger_dispatch(chip, stream, cmd);
 }
 
-static int snd_lx6464es_free(struct lx6464es *chip)
+static void snd_lx6464es_free(struct snd_card *card)
 {
-	dev_dbg(chip->card->dev, "->snd_lx6464es_free\n");
+	struct lx6464es *chip = card->private_data;
 
 	lx_irq_disable(chip);
-
-	if (chip->irq >= 0)
-		free_irq(chip->irq, chip);
-
-	iounmap(chip->port_dsp_bar);
-	ioport_unmap(chip->port_plx_remapped);
-
-	pci_release_regions(chip->pci);
-	pci_disable_device(chip->pci);
-
-	kfree(chip);
-
-	return 0;
-}
-
-static int snd_lx6464es_dev_free(struct snd_device *device)
-{
-	return snd_lx6464es_free(device->device_data);
 }
 
 /* reset the dsp during initialization */
@@ -930,22 +912,15 @@ static int lx_proc_create(struct snd_card *card, struct lx6464es *chip)
 
 
 static int snd_lx6464es_create(struct snd_card *card,
-			       struct pci_dev *pci,
-			       struct lx6464es **rchip)
+			       struct pci_dev *pci)
 {
-	struct lx6464es *chip;
+	struct lx6464es *chip = card->private_data;
 	int err;
 
-	static const struct snd_device_ops ops = {
-		.dev_free = snd_lx6464es_dev_free,
-	};
-
 	dev_dbg(card->dev, "->snd_lx6464es_create\n");
 
-	*rchip = NULL;
-
 	/* enable PCI device */
-	err = pci_enable_device(pci);
+	err = pcim_enable_device(pci);
 	if (err < 0)
 		return err;
 
@@ -956,16 +931,9 @@ static int snd_lx6464es_create(struct snd_card *card,
 	if (err < 0) {
 		dev_err(card->dev,
 			"architecture does not support 32bit PCI busmaster DMA\n");
-		pci_disable_device(pci);
 		return -ENXIO;
 	}
 
-	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (chip == NULL) {
-		err = -ENOMEM;
-		goto alloc_failed;
-	}
-
 	chip->card = card;
 	chip->pci = pci;
 	chip->irq = -1;
@@ -978,33 +946,30 @@ static int snd_lx6464es_create(struct snd_card *card,
 	/* request resources */
 	err = pci_request_regions(pci, card_name);
 	if (err < 0)
-		goto request_regions_failed;
+		return err;
 
 	/* plx port */
 	chip->port_plx = pci_resource_start(pci, 1);
-	chip->port_plx_remapped = ioport_map(chip->port_plx,
-					     pci_resource_len(pci, 1));
+	chip->port_plx_remapped = devm_ioport_map(&pci->dev, chip->port_plx,
+						  pci_resource_len(pci, 1));
+	if (!chip->port_plx_remapped)
+		return -ENOMEM;
 
 	/* dsp port */
-	chip->port_dsp_bar = pci_ioremap_bar(pci, 2);
-	if (!chip->port_dsp_bar) {
-		dev_err(card->dev, "cannot remap PCI memory region\n");
-		err = -ENOMEM;
-		goto remap_pci_failed;
-	}
+	chip->port_dsp_bar = pcim_iomap(pci, 2, 0);
+	if (!chip->port_dsp_bar)
+		return -ENOMEM;
 
-	err = request_threaded_irq(pci->irq, lx_interrupt, lx_threaded_irq,
-				   IRQF_SHARED, KBUILD_MODNAME, chip);
+	err = devm_request_threaded_irq(&pci->dev, pci->irq, lx_interrupt,
+					lx_threaded_irq, IRQF_SHARED,
+					KBUILD_MODNAME, chip);
 	if (err) {
 		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
-		goto request_irq_failed;
+		return err;
 	}
 	chip->irq = pci->irq;
 	card->sync_irq = chip->irq;
-
-	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
-	if (err < 0)
-		goto device_new_failed;
+	card->private_free = snd_lx6464es_free;
 
 	err = lx_init_dsp(chip);
 	if (err < 0) {
@@ -1025,25 +990,7 @@ static int snd_lx6464es_create(struct snd_card *card,
 	if (err < 0)
 		return err;
 
-	*rchip = chip;
 	return 0;
-
-device_new_failed:
-	free_irq(pci->irq, chip);
-
-request_irq_failed:
-	iounmap(chip->port_dsp_bar);
-
-remap_pci_failed:
-	pci_release_regions(pci);
-
-request_regions_failed:
-	kfree(chip);
-
-alloc_failed:
-	pci_disable_device(pci);
-
-	return err;
 }
 
 static int snd_lx6464es_probe(struct pci_dev *pci,
@@ -1063,15 +1010,16 @@ static int snd_lx6464es_probe(struct pci_dev *pci,
 		return -ENOENT;
 	}
 
-	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
-			   0, &card);
+	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+				sizeof(*chip), &card);
 	if (err < 0)
 		return err;
+	chip = card->private_data;
 
-	err = snd_lx6464es_create(card, pci, &chip);
+	err = snd_lx6464es_create(card, pci);
 	if (err < 0) {
 		dev_err(card->dev, "error during snd_lx6464es_create\n");
-		goto out_free;
+		return err;
 	}
 
 	strcpy(card->driver, "LX6464ES");
@@ -1088,30 +1036,18 @@ static int snd_lx6464es_probe(struct pci_dev *pci,
 
 	err = snd_card_register(card);
 	if (err < 0)
-		goto out_free;
+		return err;
 
 	dev_dbg(chip->card->dev, "initialization successful\n");
 	pci_set_drvdata(pci, card);
 	dev++;
 	return 0;
-
-out_free:
-	snd_card_free(card);
-	return err;
-
 }
 
-static void snd_lx6464es_remove(struct pci_dev *pci)
-{
-	snd_card_free(pci_get_drvdata(pci));
-}
-
-
 static struct pci_driver lx6464es_driver = {
 	.name =     KBUILD_MODNAME,
 	.id_table = snd_lx6464es_ids,
 	.probe =    snd_lx6464es_probe,
-	.remove = snd_lx6464es_remove,
 };
 
 module_pci_driver(lx6464es_driver);