ALSA: rme32: Allocate resources with device-managed APIs

This patch converts the resource management in PCI rme32 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/20210715075941.23332-22-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/rme32.c

@@ -1278,27 +1278,10 @@ static const struct snd_pcm_ops snd_rme32_capture_adat_fd_ops = {
 	.ack =		snd_rme32_capture_fd_ack,
 };
 
-static void snd_rme32_free(void *private_data)
+static void snd_rme32_free(struct rme32 *rme32)
 {
-	struct rme32 *rme32 = (struct rme32 *) private_data;
-
-	if (rme32 == NULL) {
-		return;
-	}
-	if (rme32->irq >= 0) {
+	if (rme32->irq >= 0)
 		snd_rme32_pcm_stop(rme32, 0);
-		free_irq(rme32->irq, (void *) rme32);
-		rme32->irq = -1;
-	}
-	if (rme32->iobase) {
-		iounmap(rme32->iobase);
-		rme32->iobase = NULL;
-	}
-	if (rme32->port) {
-		pci_release_regions(rme32->pci);
-		rme32->port = 0;
-	}
-	pci_disable_device(rme32->pci);
 }
 
 static void snd_rme32_free_spdif_pcm(struct snd_pcm *pcm)
@@ -1322,7 +1305,7 @@ static int snd_rme32_create(struct rme32 *rme32)
 	rme32->irq = -1;
 	spin_lock_init(&rme32->lock);
 
-	err = pci_enable_device(pci);
+	err = pcim_enable_device(pci);
 	if (err < 0)
 		return err;
 
@@ -1331,16 +1314,16 @@ static int snd_rme32_create(struct rme32 *rme32)
 		return err;
 	rme32->port = pci_resource_start(rme32->pci, 0);
 
-	rme32->iobase = ioremap(rme32->port, RME32_IO_SIZE);
+	rme32->iobase = devm_ioremap(&pci->dev, rme32->port, RME32_IO_SIZE);
 	if (!rme32->iobase) {
 		dev_err(rme32->card->dev,
 			"unable to remap memory region 0x%lx-0x%lx\n",
-			   rme32->port, rme32->port + RME32_IO_SIZE - 1);
+			rme32->port, rme32->port + RME32_IO_SIZE - 1);
 		return -ENOMEM;
 	}
 
-	if (request_irq(pci->irq, snd_rme32_interrupt, IRQF_SHARED,
-			KBUILD_MODNAME, rme32)) {
+	if (devm_request_irq(&pci->dev, pci->irq, snd_rme32_interrupt,
+			     IRQF_SHARED, KBUILD_MODNAME, rme32)) {
 		dev_err(rme32->card->dev, "unable to grab IRQ %d\n", pci->irq);
 		return -EBUSY;
 	}
@@ -1907,8 +1890,8 @@ snd_rme32_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
 		return -ENOENT;
 	}
 
-	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
-			   sizeof(struct rme32), &card);
+	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+				sizeof(*rme32), &card);
 	if (err < 0)
 		return err;
 	card->private_free = snd_rme32_card_free;
@@ -1918,10 +1901,8 @@ snd_rme32_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
         if (fullduplex[dev])
 		rme32->fullduplex_mode = 1;
 	err = snd_rme32_create(rme32);
-	if (err < 0) {
-		snd_card_free(card);
+	if (err < 0)
 		return err;
-	}
 
 	strcpy(card->driver, "Digi32");
 	switch (rme32->pci->device) {
@@ -1939,25 +1920,17 @@ snd_rme32_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
 		card->shortname, rme32->rev, rme32->port, rme32->irq);
 
 	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;
 }
 
-static void snd_rme32_remove(struct pci_dev *pci)
-{
-	snd_card_free(pci_get_drvdata(pci));
-}
-
 static struct pci_driver rme32_driver = {
 	.name =		KBUILD_MODNAME,
 	.id_table =	snd_rme32_ids,
 	.probe =	snd_rme32_probe,
-	.remove =	snd_rme32_remove,
 };
 
 module_pci_driver(rme32_driver);