ALSA: sb: Allocate resources with device-managed APIs

This patch converts the resource management in ISA sb drivers 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/20210715075941.23332-55-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 13 insertions, 35 deletions

diff --git a/sound/isa/sb/sb8.c b/sound/isa/sb/sb8.c
index b08e6e7690c9..e5ef1777161f 100644
--- a/sound/isa/sb/sb8.c
+++ b/sound/isa/sb/sb8.c
@@ -54,15 +54,6 @@ static irqreturn_t snd_sb8_interrupt(int irq, void *dev_id)
 	}
 }
 
-static void snd_sb8_free(struct snd_card *card)
-{
-	struct snd_sb8 *acard = card->private_data;
-
-	if (acard == NULL)
-		return;
-	release_and_free_resource(acard->fm_res);
-}
-
 static int snd_sb8_match(struct device *pdev, unsigned int dev)
 {
 	if (!enable[dev])
@@ -86,26 +77,26 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev)
 	struct snd_opl3 *opl3;
 	int err;
 
-	err = snd_card_new(pdev, index[dev], id[dev], THIS_MODULE,
-			   sizeof(struct snd_sb8), &card);
+	err = snd_devm_card_new(pdev, index[dev], id[dev], THIS_MODULE,
+				sizeof(struct snd_sb8), &card);
 	if (err < 0)
 		return err;
 	acard = card->private_data;
-	card->private_free = snd_sb8_free;
 
 	/*
 	 * Block the 0x388 port to avoid PnP conflicts.
 	 * No need to check this value after request_region,
 	 * as we never do anything with it.
 	 */
-	acard->fm_res = request_region(0x388, 4, "SoundBlaster FM");
+	acard->fm_res = devm_request_region(card->dev, 0x388, 4,
+					    "SoundBlaster FM");
 
 	if (port[dev] != SNDRV_AUTO_PORT) {
 		err = snd_sbdsp_create(card, port[dev], irq[dev],
 				       snd_sb8_interrupt, dma8[dev],
 				       -1, SB_HW_AUTO, &chip);
 		if (err < 0)
-			goto _err;
+			return err;
 	} else {
 		/* auto-probe legacy ports */
 		static const unsigned long possible_ports[] = {
@@ -125,10 +116,8 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev)
 				break;
 			}
 		}
-		if (i >= ARRAY_SIZE(possible_ports)) {
-			err = -EINVAL;
-			goto _err;
-		}
+		if (i >= ARRAY_SIZE(possible_ports))
+			return -EINVAL;
 	}
 	acard->chip = chip;
 			
@@ -139,17 +128,16 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev)
 		else
 			snd_printk(KERN_WARNING "SB 16 chip detected at 0x%lx, try snd-sb16 module\n",
 				   port[dev]);
-		err = -ENODEV;
-		goto _err;
+		return -ENODEV;
 	}
 
 	err = snd_sb8dsp_pcm(chip, 0);
 	if (err < 0)
-		goto _err;
+		return err;
 
 	err = snd_sbmixer_new(chip);
 	if (err < 0)
-		goto _err;
+		return err;
 
 	if (chip->hardware == SB_HW_10 || chip->hardware == SB_HW_20) {
 		err = snd_opl3_create(card, chip->port + 8, 0,
@@ -167,12 +155,12 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev)
 	if (err >= 0) {
 		err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
 		if (err < 0)
-			goto _err;
+			return err;
 	}
 
 	err = snd_sb8dsp_midi(chip, 0);
 	if (err < 0)
-		goto _err;
+		return err;
 
 	strcpy(card->driver, chip->hardware == SB_HW_PRO ? "SB Pro" : "SB8");
 	strcpy(card->shortname, chip->name);
@@ -183,19 +171,10 @@ static int snd_sb8_probe(struct device *pdev, unsigned int dev)
 
 	err = snd_card_register(card);
 	if (err < 0)
-		goto _err;
+		return err;
 
 	dev_set_drvdata(pdev, card);
 	return 0;
-
- _err:
-	snd_card_free(card);
-	return err;
-}
-
-static void snd_sb8_remove(struct device *pdev, unsigned int dev)
-{
-	snd_card_free(dev_get_drvdata(pdev));
 }
 
 #ifdef CONFIG_PM
@@ -229,7 +208,6 @@ static int snd_sb8_resume(struct device *dev, unsigned int n)
 static struct isa_driver snd_sb8_driver = {
 	.match		= snd_sb8_match,
 	.probe		= snd_sb8_probe,
-	.remove		= snd_sb8_remove,
 #ifdef CONFIG_PM
 	.suspend	= snd_sb8_suspend,
 	.resume		= snd_sb8_resume,