ALSA: als4000: Allocate resources with device-managed APIs

This patch converts the resource management in PCI als4000 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/20210715075941.23332-11-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/als4000.c

@@ -746,13 +746,15 @@ static int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev)
 
 	if (joystick_port[dev] == 1) { /* auto-detect */
 		for (io_port = 0x200; io_port <= 0x218; io_port += 8) {
-			r = request_region(io_port, 8, "ALS4000 gameport");
+			r = devm_request_region(&acard->pci->dev, io_port, 8,
+						"ALS4000 gameport");
 			if (r)
 				break;
 		}
 	} else {
 		io_port = joystick_port[dev];
-		r = request_region(io_port, 8, "ALS4000 gameport");
+		r = devm_request_region(&acard->pci->dev, io_port, 8,
+					"ALS4000 gameport");
 	}
 
 	if (!r) {
@@ -763,7 +765,6 @@ static int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev)
 	acard->gameport = gp = gameport_allocate_port();
 	if (!gp) {
 		dev_err(&acard->pci->dev, "cannot allocate memory for gameport\n");
-		release_and_free_resource(r);
 		return -ENOMEM;
 	}
 
@@ -771,7 +772,6 @@ static int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev)
 	gameport_set_phys(gp, "pci%s/gameport0", pci_name(acard->pci));
 	gameport_set_dev_parent(gp, &acard->pci->dev);
 	gp->io = io_port;
-	gameport_set_port_data(gp, r);
 
 	/* Enable legacy joystick port */
 	snd_als4000_set_addr(acard->iobase, 0, 0, 0, 1);
@@ -784,15 +784,11 @@ static int snd_als4000_create_gameport(struct snd_card_als4000 *acard, int dev)
 static void snd_als4000_free_gameport(struct snd_card_als4000 *acard)
 {
 	if (acard->gameport) {
-		struct resource *r = gameport_get_port_data(acard->gameport);
-
 		gameport_unregister_port(acard->gameport);
 		acard->gameport = NULL;
 
 		/* disable joystick */
 		snd_als4000_set_addr(acard->iobase, 0, 0, 0, 0);
-
-		release_and_free_resource(r);
 	}
 }
 #else
@@ -808,8 +804,6 @@ static void snd_card_als4000_free( struct snd_card *card )
 	snd_als4k_gcr_write_addr(acard->iobase, ALS4K_GCR8C_MISC_CTRL, 0);
 	/* free resources */
 	snd_als4000_free_gameport(acard);
-	pci_release_regions(acard->pci);
-	pci_disable_device(acard->pci);
 }
 
 static int snd_card_als4000_probe(struct pci_dev *pci,
@@ -832,36 +826,30 @@ static int snd_card_als4000_probe(struct pci_dev *pci,
 	}
 
 	/* enable PCI device */
-	err = pci_enable_device(pci);
+	err = pcim_enable_device(pci);
 	if (err < 0)
 		return err;
 
 	/* check, if we can restrict PCI DMA transfers to 24 bits */
 	if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(24))) {
 		dev_err(&pci->dev, "architecture does not support 24bit PCI busmaster DMA\n");
-		pci_disable_device(pci);
 		return -ENXIO;
 	}
 
 	err = pci_request_regions(pci, "ALS4000");
-	if (err < 0) {
-		pci_disable_device(pci);
+	if (err < 0)
 		return err;
-	}
 	iobase = pci_resource_start(pci, 0);
 
 	pci_read_config_word(pci, PCI_COMMAND, &word);
 	pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO);
 	pci_set_master(pci);
 	
-	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
 				sizeof(*acard) /* private_data: acard */,
 				&card);
-	if (err < 0) {
-		pci_release_regions(pci);
-		pci_disable_device(pci);
+	if (err < 0)
 		return err;
-	}
 
 	acard = card->private_data;
 	acard->pci = pci;
@@ -881,7 +869,7 @@ static int snd_card_als4000_probe(struct pci_dev *pci,
 			       SB_HW_ALS4000,
 			       &chip);
 	if (err < 0)
-		goto out_err;
+		return err;
 	acard->chip = chip;
 
 	chip->pci = pci;
@@ -902,7 +890,7 @@ static int snd_card_als4000_probe(struct pci_dev *pci,
 	if (err < 0) {
 		dev_err(&pci->dev, "no MPU-401 device at 0x%lx?\n",
 				iobase + ALS4K_IOB_30_MIDI_DATA);
-		goto out_err;
+		return err;
 	}
 	/* FIXME: ALS4000 has interesting MPU401 configuration features
 	 * at ALS4K_CR1A_MPU401_UART_MODE_CONTROL
@@ -912,11 +900,11 @@ static int snd_card_als4000_probe(struct pci_dev *pci,
 
 	err = snd_als4000_pcm(chip, 0);
 	if (err < 0)
-		goto out_err;
+		return err;
 
 	err = snd_sbmixer_new(chip);
 	if (err < 0)
-		goto out_err;
+		return err;
 
 	if (snd_opl3_create(card,
 				iobase + ALS4K_IOB_10_ADLIB_ADDR0,
@@ -928,30 +916,18 @@ static int snd_card_als4000_probe(struct pci_dev *pci,
 	} else {
 		err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
 		if (err < 0)
-			goto out_err;
+			return err;
 	}
 
 	snd_als4000_create_gameport(acard, dev);
 
 	err = snd_card_register(card);
 	if (err < 0)
-		goto out_err;
+		return err;
 
 	pci_set_drvdata(pci, card);
 	dev++;
-	err = 0;
-	goto out;
-
-out_err:
-	snd_card_free(card);
-	
-out:
-	return err;
-}
-
-static void snd_card_als4000_remove(struct pci_dev *pci)
-{
-	snd_card_free(pci_get_drvdata(pci));
+	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -996,7 +972,6 @@ static struct pci_driver als4000_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = snd_als4000_ids,
 	.probe = snd_card_als4000_probe,
-	.remove = snd_card_als4000_remove,
 	.driver = {
 		.pm = SND_ALS4000_PM_OPS,
 	},