ALSA: wavefront: Allocate resources with device-managed APIs

This patch converts the resource management in ISA wavefront driver
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/wavefront/wavefront.c

···
 	return rmidi;
 }
 
-static void
-snd_wavefront_free(struct snd_card *card)
-{
-	snd_wavefront_card_t *acard = (snd_wavefront_card_t *)card->private_data;
-	
-	if (acard) {
-		release_and_free_resource(acard->wavefront.res_base);
-		if (acard->wavefront.irq > 0)
-			free_irq(acard->wavefront.irq, (void *)acard);
-	}
-}
-
 static int snd_wavefront_card_new(struct device *pdev, int dev,
 				  struct snd_card **cardp)
 {
···
 	snd_wavefront_card_t *acard;
 	int err;
 
-	err = snd_card_new(pdev, index[dev], id[dev], THIS_MODULE,
-			   sizeof(snd_wavefront_card_t), &card);
+	err = snd_devm_card_new(pdev, index[dev], id[dev], THIS_MODULE,
+				sizeof(snd_wavefront_card_t), &card);
 	if (err < 0)
 		return err;
 
···
 	spin_lock_init(&acard->wavefront.midi.open);
 	spin_lock_init(&acard->wavefront.midi.virtual);
 	acard->wavefront.card = card;
-	card->private_free = snd_wavefront_free;
 
 	*cardp = card;
 	return 0;
···
 
 	/* ------- ICS2115 Wavetable synth ------- */
 
-	acard->wavefront.res_base = request_region(ics2115_port[dev], 16,
-						   "ICS2115");
+	acard->wavefront.res_base =
+		devm_request_region(card->dev, ics2115_port[dev], 16,
+				    "ICS2115");
 	if (acard->wavefront.res_base == NULL) {
 		snd_printk(KERN_ERR "unable to grab ICS2115 i/o region 0x%lx-0x%lx\n",
 			   ics2115_port[dev], ics2115_port[dev] + 16 - 1);
 		return -EBUSY;
 	}
-	if (request_irq(ics2115_irq[dev], snd_wavefront_ics2115_interrupt,
-			0, "ICS2115", acard)) {
+	if (devm_request_irq(card->dev, ics2115_irq[dev],
+			     snd_wavefront_ics2115_interrupt,
+			     0, "ICS2115", acard)) {
 		snd_printk(KERN_ERR "unable to use ICS2115 IRQ %d\n", ics2115_irq[dev]);
 		return -EBUSY;
 	}
···
 	if (err < 0)
 		return err;
 	err = snd_wavefront_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_wavefront_isa_remove(struct device *devptr,
-				    unsigned int dev)
-{
-	snd_card_free(dev_get_drvdata(devptr));
 }
 
 #define DEV_NAME "wavefront"
···
 static struct isa_driver snd_wavefront_driver = {
 	.match		= snd_wavefront_isa_match,
 	.probe		= snd_wavefront_isa_probe,
-	.remove		= snd_wavefront_isa_remove,
 	/* FIXME: suspend, resume */
 	.driver		= {
 		.name	= DEV_NAME
···
 	if (snd_wavefront_pnp (dev, card->private_data, pcard, pid) < 0) {
 		if (cs4232_pcm_port[dev] == SNDRV_AUTO_PORT) {
 			snd_printk (KERN_ERR "isapnp detection failed\n");
-			snd_card_free (card);
 			return -ENODEV;
 		}
 	}
···
 	return 0;
 }
 
-static void snd_wavefront_pnp_remove(struct pnp_card_link *pcard)
-{
-	snd_card_free(pnp_get_card_drvdata(pcard));
-	pnp_set_card_drvdata(pcard, NULL);
-}
-
 static struct pnp_card_driver wavefront_pnpc_driver = {
 	.flags		= PNP_DRIVER_RES_DISABLE,
 	.name		= "wavefront",
 	.id_table	= snd_wavefront_pnpids,
 	.probe		= snd_wavefront_pnp_detect,
-	.remove		= snd_wavefront_pnp_remove,
 	/* FIXME: suspend,resume */
 };