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ALSA: mpu401: Allocate resources with device-managed APIs 

This patch converts the card object management with devres as a clean
up.  The remove callback gets reduced by that.

This should give no user-visible functional changes.

Note that this converts only the mpu401 card driver.  The mpu401_uart
component is still managed with snd_device.  It's for the case where
the mpu401_uart component may be removed dynamically without the
actual device unbind.

Link: https://lore.kernel.org/r/20210715075941.23332-77-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2021-07-15 09:59:38 +02:00
parent 60d03de81c
commit de74763295
1 changed files with 5 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
sound/drivers/mpu401/mpu401.c
View File

@ -59,8 +59,8 @@ static int snd_mpu401_create(struct device *devptr, int dev,
snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n");
*rcard = NULL;
err = snd_card_new(devptr, index[dev], id[dev], THIS_MODULE,
0, &card);
err = snd_devm_card_new(devptr, index[dev], id[dev], THIS_MODULE,
0, &card);
if (err < 0)
return err;
strcpy(card->driver, "MPU-401 UART");
@ -76,15 +76,11 @@ static int snd_mpu401_create(struct device *devptr, int dev,
irq[dev], NULL);
if (err < 0) {
printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
goto _err;
return err;
}
*rcard = card;
return 0;
_err:
snd_card_free(card);
return err;
}
static int snd_mpu401_probe(struct platform_device *devptr)
@ -105,25 +101,16 @@ static int snd_mpu401_probe(struct platform_device *devptr)
if (err < 0)
return err;
err = snd_card_register(card);
if (err < 0) {
snd_card_free(card);
if (err < 0)
return err;
}
platform_set_drvdata(devptr, card);
return 0;
}
static int snd_mpu401_remove(struct platform_device *devptr)
{
snd_card_free(platform_get_drvdata(devptr));
return 0;
}
#define SND_MPU401_DRIVER "snd_mpu401"
static struct platform_driver snd_mpu401_driver = {
.probe = snd_mpu401_probe,
.remove = snd_mpu401_remove,
.driver = {
.name = SND_MPU401_DRIVER,
},
@ -184,10 +171,8 @@ static int snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
if (err < 0)
return err;
err = snd_card_register(card);
if (err < 0) {
snd_card_free(card);
if (err < 0)
return err;
}
pnp_set_drvdata(pnp_dev, card);
snd_mpu401_devices++;
++dev;
@ -196,19 +181,10 @@ static int snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
return -ENODEV;
}
static void snd_mpu401_pnp_remove(struct pnp_dev *dev)
{
struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);
snd_card_disconnect(card);
snd_card_free_when_closed(card);
}
static struct pnp_driver snd_mpu401_pnp_driver = {
.name = "mpu401",
.id_table = snd_mpu401_pnpids,
.probe = snd_mpu401_pnp_probe,
.remove = snd_mpu401_pnp_remove,
};
#else
static struct pnp_driver snd_mpu401_pnp_driver;