ALSA: cs5530: Allocate resources with device-managed APIs

This patch converts the resource management in PCI cs5530 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/20210715075941.23332-16-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/cs5530.c

@@ -65,25 +65,6 @@ static const struct pci_device_id snd_cs5530_ids[] = {
 
 MODULE_DEVICE_TABLE(pci, snd_cs5530_ids);
 
-static int snd_cs5530_free(struct snd_cs5530 *chip)
-{
-	pci_release_regions(chip->pci);
-	pci_disable_device(chip->pci);
-	kfree(chip);
-	return 0;
-}
-
-static int snd_cs5530_dev_free(struct snd_device *device)
-{
-	struct snd_cs5530 *chip = device->device_data;
-	return snd_cs5530_free(chip);
-}
-
-static void snd_cs5530_remove(struct pci_dev *pci)
-{
-	snd_card_free(pci_get_drvdata(pci));
-}
-
 static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
 {
 	outb(reg, io + 4);
@@ -94,50 +75,28 @@ static u8 snd_cs5530_mixer_read(unsigned long io, u8 reg)
 }
 
 static int snd_cs5530_create(struct snd_card *card,
-			     struct pci_dev *pci,
-			     struct snd_cs5530 **rchip)
+			     struct pci_dev *pci)
 {
-	struct snd_cs5530 *chip;
+	struct snd_cs5530 *chip = card->private_data;
 	unsigned long sb_base;
 	u8 irq, dma8, dma16 = 0;
 	u16 map;
 	void __iomem *mem;
 	int err;
 
-	static const struct snd_device_ops ops = {
-		.dev_free = snd_cs5530_dev_free,
-	};
-	*rchip = NULL;
-
-	err = pci_enable_device(pci);
+	err = pcim_enable_device(pci);
  	if (err < 0)
 		return err;
 
-	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (chip == NULL) {
-		pci_disable_device(pci);
-		return -ENOMEM;
-	}
-
 	chip->card = card;
 	chip->pci = pci;
 
-	err = pci_request_regions(pci, "CS5530");
-	if (err < 0) {
-		kfree(chip); 
-		pci_disable_device(pci);
+	err = pcim_iomap_regions(pci, 1 << 0, "CS5530");
+	if (err < 0)
 		return err;
-	}
 	chip->pci_base = pci_resource_start(pci, 0);
-
-	mem = pci_ioremap_bar(pci, 0);
-	if (mem == NULL) {
-		snd_cs5530_free(chip);
-		return -EBUSY;
-	}
-
+	mem = pcim_iomap_table(pci)[0];
 	map = readw(mem + 0x18);
-	iounmap(mem);
 
 	/* Map bits
 		0:1	* 0x20 + 0x200 = sb base
@@ -154,7 +113,6 @@ static int snd_cs5530_create(struct snd_card *card,
 		dev_info(card->dev, "XpressAudio at 0x%lx\n", sb_base);
 	else {
 		dev_err(card->dev, "Could not find XpressAudio!\n");
-		snd_cs5530_free(chip);
 		return -ENODEV;
 	}
 
@@ -174,7 +132,6 @@ static int snd_cs5530_create(struct snd_card *card,
 		dma16 = 7;
 	else {
 		dev_err(card->dev, "No 16bit DMA enabled\n");
-		snd_cs5530_free(chip);
 		return -ENODEV;
 	}
 
@@ -186,7 +143,6 @@ static int snd_cs5530_create(struct snd_card *card,
 		dma8 = 3;
 	else {
 		dev_err(card->dev, "No 8bit DMA enabled\n");
-		snd_cs5530_free(chip);
 		return -ENODEV;
 	}
 
@@ -200,7 +156,6 @@ static int snd_cs5530_create(struct snd_card *card,
 		irq = 10;
 	else {
 		dev_err(card->dev, "SoundBlaster IRQ not set\n");
-		snd_cs5530_free(chip);
 		return -ENODEV;
 	}
 
@@ -210,31 +165,21 @@ static int snd_cs5530_create(struct snd_card *card,
 						dma16, SB_HW_CS5530, &chip->sb);
 	if (err < 0) {
 		dev_err(card->dev, "Could not create SoundBlaster\n");
-		snd_cs5530_free(chip);
 		return err;
 	}
 
 	err = snd_sb16dsp_pcm(chip->sb, 0);
 	if (err < 0) {
 		dev_err(card->dev, "Could not create PCM\n");
-		snd_cs5530_free(chip);
 		return err;
 	}
 
 	err = snd_sbmixer_new(chip->sb);
 	if (err < 0) {
 		dev_err(card->dev, "Could not create Mixer\n");
-		snd_cs5530_free(chip);
-		return err;
-	}
-
-	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
-	if (err < 0) {
-		snd_cs5530_free(chip);
 		return err;
 	}
 
-	*rchip = chip;
 	return 0;
 }
 
@@ -243,7 +188,7 @@ static int snd_cs5530_probe(struct pci_dev *pci,
 {
 	static int dev;
 	struct snd_card *card;
-	struct snd_cs5530 *chip = NULL;
+	struct snd_cs5530 *chip;
 	int err;
 
 	if (dev >= SNDRV_CARDS)
@@ -253,27 +198,23 @@ static int snd_cs5530_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_cs5530_create(card, pci, &chip);
-	if (err < 0) {
-		snd_card_free(card);
+	err = snd_cs5530_create(card, pci);
+	if (err < 0)
 		return err;
-	}
 
 	strcpy(card->driver, "CS5530");
 	strcpy(card->shortname, "CS5530 Audio");
 	sprintf(card->longname, "%s at 0x%lx", card->shortname, chip->pci_base);
 
 	err = snd_card_register(card);
-	if (err < 0) {
-		snd_card_free(card);
+	if (err < 0)
 		return err;
-	}
 	pci_set_drvdata(pci, card);
 	dev++;
 	return 0;
@@ -283,7 +224,6 @@ static struct pci_driver cs5530_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = snd_cs5530_ids,
 	.probe = snd_cs5530_probe,
-	.remove = snd_cs5530_remove,
 };
 
 module_pci_driver(cs5530_driver);