ALSA: cs423x: Allocate resources with device-managed APIs

This patch converts the resource management in ISA cs423x drivers with
devres as a clean up. Each manual resource management is converted
with the corresponding devres helper. The remove callback became
superfluous and dropped.

This should give no user-visible functional changes.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Takashi Iwai <[e-mail]>

sound/isa/cs423x/cs4231.c

···
 	struct snd_wss *chip;
 	int error;
 
-	error = snd_card_new(dev, index[n], id[n], THIS_MODULE, 0, &card);
+	error = snd_devm_card_new(dev, index[n], id[n], THIS_MODULE, 0, &card);
 	if (error < 0)
 		return error;
 
 	error = snd_wss_create(card, port[n], -1, irq[n], dma1[n], dma2[n],
 			WSS_HW_DETECT, 0, &chip);
 	if (error < 0)
-		goto out;
+		return error;
 
 	card->private_data = chip;
 
 	error = snd_wss_pcm(chip, 0);
 	if (error < 0)
-		goto out;
+		return error;
 
 	strscpy(card->driver, "CS4231", sizeof(card->driver));
 	strscpy(card->shortname, chip->pcm->name, sizeof(card->shortname));
···
 
 	error = snd_wss_mixer(chip);
 	if (error < 0)
-		goto out;
+		return error;
 
 	error = snd_wss_timer(chip, 0);
 	if (error < 0)
-		goto out;
+		return error;
 
 	if (mpu_port[n] > 0 && mpu_port[n] != SNDRV_AUTO_PORT) {
 		if (mpu_irq[n] == SNDRV_AUTO_IRQ)
···
 
 	error = snd_card_register(card);
 	if (error < 0)
-		goto out;
+		return error;
 
 	dev_set_drvdata(dev, card);
 	return 0;
-
-out:	snd_card_free(card);
-	return error;
-}
-
-static void snd_cs4231_remove(struct device *dev, unsigned int n)
-{
-	snd_card_free(dev_get_drvdata(dev));
 }
 
 #ifdef CONFIG_PM
···
 static struct isa_driver snd_cs4231_driver = {
 	.match		= snd_cs4231_match,
 	.probe		= snd_cs4231_probe,
-	.remove		= snd_cs4231_remove,
 #ifdef CONFIG_PM
 	.suspend	= snd_cs4231_suspend,
 	.resume		= snd_cs4231_resume,

sound/isa/cs423x/cs4236.c

···
 
 struct snd_card_cs4236 {
 	struct snd_wss *chip;
-	struct resource *res_sb_port;
 #ifdef CONFIG_PNP
 	struct pnp_dev *wss;
 	struct pnp_dev *ctrl;
···
 #define is_isapnp_selected(dev)		0
 #endif
 
-static void snd_card_cs4236_free(struct snd_card *card)
-{
-	struct snd_card_cs4236 *acard = card->private_data;
-
-	release_and_free_resource(acard->res_sb_port);
-}
-
 static int snd_cs423x_card_new(struct device *pdev, int dev,
 			       struct snd_card **cardp)
 {
 	struct snd_card *card;
 	int err;
 
-	err = snd_card_new(pdev, index[dev], id[dev], THIS_MODULE,
-			   sizeof(struct snd_card_cs4236), &card);
+	err = snd_devm_card_new(pdev, index[dev], id[dev], THIS_MODULE,
+				sizeof(struct snd_card_cs4236), &card);
 	if (err < 0)
 		return err;
-	card->private_free = snd_card_cs4236_free;
 	*cardp = card;
 	return 0;
 }
···
 
 	acard = card->private_data;
 	if (sb_port[dev] > 0 && sb_port[dev] != SNDRV_AUTO_PORT) {
-		acard->res_sb_port = request_region(sb_port[dev], 16, IDENT " SB");
-		if (!acard->res_sb_port) {
+		if (!devm_request_region(card->dev, sb_port[dev], 16,
+					 IDENT " SB")) {
 			printk(KERN_ERR IDENT ": unable to register SB port at 0x%lx\n", sb_port[dev]);
 			return -EBUSY;
 		}
···
 	if (err < 0)
 		return err;
 	err = snd_cs423x_probe(card, dev);
-	if (err < 0) {
-		snd_card_free(card);
+	if (err < 0)
 		return err;
-	}
-
 	dev_set_drvdata(pdev, card);
 	return 0;
-}
-
-static void snd_cs423x_isa_remove(struct device *pdev,
-				 unsigned int dev)
-{
-	snd_card_free(dev_get_drvdata(pdev));
 }
 
 #ifdef CONFIG_PM
···
 static struct isa_driver cs423x_isa_driver = {
 	.match		= snd_cs423x_isa_match,
 	.probe		= snd_cs423x_isa_probe,
-	.remove		= snd_cs423x_isa_remove,
 #ifdef CONFIG_PM
 	.suspend	= snd_cs423x_isa_suspend,
 	.resume		= snd_cs423x_isa_resume,
···
 	err = snd_card_cs423x_pnp(dev, card->private_data, pdev, cdev);
 	if (err < 0) {
 		printk(KERN_ERR "PnP BIOS detection failed for " IDENT "\n");
-		snd_card_free(card);
 		return err;
 	}
 	err = snd_cs423x_probe(card, dev);
-	if (err < 0) {
-		snd_card_free(card);
+	if (err < 0)
 		return err;
-	}
 	pnp_set_drvdata(pdev, card);
 	dev++;
 	return 0;
-}
-
-static void snd_cs423x_pnp_remove(struct pnp_dev *pdev)
-{
-	snd_card_free(pnp_get_drvdata(pdev));
 }
 
 #ifdef CONFIG_PM
···
 	.name = "cs423x-pnpbios",
 	.id_table = snd_cs423x_pnpbiosids,
 	.probe = snd_cs423x_pnpbios_detect,
-	.remove = snd_cs423x_pnp_remove,
 #ifdef CONFIG_PM
 	.suspend	= snd_cs423x_pnp_suspend,
 	.resume		= snd_cs423x_pnp_resume,
···
 	if (res < 0) {
 		printk(KERN_ERR "isapnp detection failed and probing for " IDENT
 		       " is not supported\n");
-		snd_card_free(card);
 		return res;
 	}
 	res = snd_cs423x_probe(card, dev);
-	if (res < 0) {
-		snd_card_free(card);
+	if (res < 0)
 		return res;
-	}
 	pnp_set_card_drvdata(pcard, card);
 	dev++;
 	return 0;
-}
-
-static void snd_cs423x_pnpc_remove(struct pnp_card_link *pcard)
-{
-	snd_card_free(pnp_get_card_drvdata(pcard));
-	pnp_set_card_drvdata(pcard, NULL);
 }
 
 #ifdef CONFIG_PM
···
 	.name = CS423X_ISAPNP_DRIVER,
 	.id_table = snd_cs423x_pnpids,
 	.probe = snd_cs423x_pnpc_detect,
-	.remove = snd_cs423x_pnpc_remove,
 #ifdef CONFIG_PM
 	.suspend	= snd_cs423x_pnpc_suspend,
 	.resume		= snd_cs423x_pnpc_resume,