ALSA: vx: Manage vx_core object with devres

The firmware data are also released automatically.

Link: https://lore.kernel.org/r/20210715075941.23332-50-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/drivers/vx/vx_core.c

@@ -774,6 +774,11 @@ int snd_vx_resume(struct vx_core *chip)
 EXPORT_SYMBOL(snd_vx_resume);
 #endif
 
+static void snd_vx_release(struct device *dev, void *data)
+{
+	snd_vx_free_firmware(data);
+}
+
 /**
  * snd_vx_create - constructor for struct vx_core
  * @card: card instance
@@ -784,6 +789,8 @@ EXPORT_SYMBOL(snd_vx_resume);
  * this function allocates the instance and prepare for the hardware
  * initialization.
  *
+ * The object is managed via devres, and will be automatically released.
+ *
  * return the instance pointer if successful, NULL in error.
  */
 struct vx_core *snd_vx_create(struct snd_card *card,
@@ -796,8 +803,9 @@ struct vx_core *snd_vx_create(struct snd_card *card,
 	if (snd_BUG_ON(!card || !hw || !ops))
 		return NULL;
 
-	chip = kzalloc(sizeof(*chip) + extra_size, GFP_KERNEL);
-	if (! chip)
+	chip = devres_alloc(snd_vx_release, sizeof(*chip) + extra_size,
+			    GFP_KERNEL);
+	if (!chip)
 		return NULL;
 	mutex_init(&chip->lock);
 	chip->irq = -1;

sound/pci/vx222/vx222.c

@@ -109,7 +109,6 @@ static int snd_vx222_free(struct vx_core *chip)
 	if (vx->port[0])
 		pci_release_regions(vx->pci);
 	pci_disable_device(vx->pci);
-	kfree(chip);
 	return 0;
 }
 

sound/pcmcia/vx/vxpocket.c

@@ -50,19 +50,6 @@ static void vxpocket_release(struct pcmcia_device *link)
 	pcmcia_disable_device(link);
 }
 
-/*
- * destructor, called from snd_card_free_when_closed()
- */
-static int snd_vxpocket_dev_free(struct snd_device *device)
-{
-	struct vx_core *chip = device->device_data;
-
-	snd_vx_free_firmware(chip);
-	kfree(chip);
-	return 0;
-}
-
-
 /*
  * Hardware information
  */
@@ -122,21 +109,12 @@ static int snd_vxpocket_new(struct snd_card *card, int ibl,
 {
 	struct vx_core *chip;
 	struct snd_vxpocket *vxp;
-	static const struct snd_device_ops ops = {
-		.dev_free =	snd_vxpocket_dev_free,
-	};
-	int err;
 
 	chip = snd_vx_create(card, &vxpocket_hw, &snd_vxpocket_ops,
 			     sizeof(struct snd_vxpocket) - sizeof(struct vx_core));
 	if (!chip)
 		return -ENOMEM;
 
-	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
-	if (err < 0) {
-		kfree(chip);
-		return err;
-	}
 	chip->ibl.size = ibl;
 
 	vxp = to_vxpocket(chip);