ALSA: rme96: Allocate resources with device-managed APIs

This patch converts the resource management in PCI rme96 driver with
devres as a clean up.  Each manual resource management is converted
with the corresponding devres helper.

This should give no user-visible functional changes.

Link: https://lore.kernel.org/r/20210715075941.23332-23-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/rme96.c

@@ -1562,33 +1562,17 @@ static const struct snd_pcm_ops snd_rme96_capture_adat_ops = {
 };
 
 static void
-snd_rme96_free(void *private_data)
+snd_rme96_free(struct rme96 *rme96)
 {
-	struct rme96 *rme96 = (struct rme96 *)private_data;
-
-	if (!rme96)
-	        return;
-
 	if (rme96->irq >= 0) {
 		snd_rme96_trigger(rme96, RME96_STOP_BOTH);
 		rme96->areg &= ~RME96_AR_DAC_EN;
 		writel(rme96->areg, rme96->iobase + RME96_IO_ADDITIONAL_REG);
-		free_irq(rme96->irq, (void *)rme96);
-		rme96->irq = -1;
-	}
-	if (rme96->iobase) {
-		iounmap(rme96->iobase);
-		rme96->iobase = NULL;
-	}
-	if (rme96->port) {
-		pci_release_regions(rme96->pci);
-		rme96->port = 0;
 	}
 #ifdef CONFIG_PM_SLEEP
 	vfree(rme96->playback_suspend_buffer);
 	vfree(rme96->capture_suspend_buffer);
 #endif
-	pci_disable_device(rme96->pci);
 }
 
 static void
@@ -1614,7 +1598,7 @@ snd_rme96_create(struct rme96 *rme96)
 	rme96->irq = -1;
 	spin_lock_init(&rme96->lock);
 
-	err = pci_enable_device(pci);
+	err = pcim_enable_device(pci);
 	if (err < 0)
 		return err;
 
@@ -1623,16 +1607,16 @@ snd_rme96_create(struct rme96 *rme96)
 		return err;
 	rme96->port = pci_resource_start(rme96->pci, 0);
 
-	rme96->iobase = ioremap(rme96->port, RME96_IO_SIZE);
+	rme96->iobase = devm_ioremap(&pci->dev, rme96->port, RME96_IO_SIZE);
 	if (!rme96->iobase) {
 		dev_err(rme96->card->dev,
 			"unable to remap memory region 0x%lx-0x%lx\n",
 			rme96->port, rme96->port + RME96_IO_SIZE - 1);
-		return -ENOMEM;
+		return -EBUSY;
 	}
 
-	if (request_irq(pci->irq, snd_rme96_interrupt, IRQF_SHARED,
-			KBUILD_MODNAME, rme96)) {
+	if (devm_request_irq(&pci->dev, pci->irq, snd_rme96_interrupt,
+			     IRQF_SHARED, KBUILD_MODNAME, rme96)) {
 		dev_err(rme96->card->dev, "unable to grab IRQ %d\n", pci->irq);
 		return -EBUSY;
 	}
@@ -2462,8 +2446,8 @@ snd_rme96_probe(struct pci_dev *pci,
 		dev++;
 		return -ENOENT;
 	}
-	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
-			   sizeof(struct rme96), &card);
+	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+				sizeof(*rme96), &card);
 	if (err < 0)
 		return err;
 	card->private_free = snd_rme96_card_free;
@@ -2472,19 +2456,15 @@ snd_rme96_probe(struct pci_dev *pci,
 	rme96->pci = pci;
 	err = snd_rme96_create(rme96);
 	if (err)
-		goto free_card;
+		return err;
 	
 #ifdef CONFIG_PM_SLEEP
 	rme96->playback_suspend_buffer = vmalloc(RME96_BUFFER_SIZE);
-	if (!rme96->playback_suspend_buffer) {
-		err = -ENOMEM;
-		goto free_card;
-	}
+	if (!rme96->playback_suspend_buffer)
+		return -ENOMEM;
 	rme96->capture_suspend_buffer = vmalloc(RME96_BUFFER_SIZE);
-	if (!rme96->capture_suspend_buffer) {
-		err = -ENOMEM;
-		goto free_card;
-	}
+	if (!rme96->capture_suspend_buffer)
+		return -ENOMEM;
 #endif
 
 	strcpy(card->driver, "Digi96");
@@ -2511,26 +2491,17 @@ snd_rme96_probe(struct pci_dev *pci,
 		rme96->port, rme96->irq);
 	err = snd_card_register(card);
 	if (err)
-		goto free_card;
+		return err;
 
 	pci_set_drvdata(pci, card);
 	dev++;
 	return 0;
-free_card:
-	snd_card_free(card);
-	return err;
-}
-
-static void snd_rme96_remove(struct pci_dev *pci)
-{
-	snd_card_free(pci_get_drvdata(pci));
 }
 
 static struct pci_driver rme96_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = snd_rme96_ids,
 	.probe = snd_rme96_probe,
-	.remove = snd_rme96_remove,
 	.driver = {
 		.pm = RME96_PM_OPS,
 	},