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ALSA: serial-u16550: Allocate resources with device-managed APIs

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This patch converts the resource management in serial u16550 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/20210715075941.23332-76-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2021-07-15 09:59:37 +02:00
parent aa92050f10
commit 60d03de81c
1 changed files with 9 additions and 48 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

57
sound/drivers/serial-u16550.c
View file

@ -115,7 +115,6 @@ struct snd_uart16550 {
int irq;
unsigned long base;
struct resource *res_base;
unsigned int speed;
unsigned int speed_base;
@ -323,8 +322,7 @@ static int snd_uart16550_detect(struct snd_uart16550 *uart)
return -ENODEV; /* Not configured */
}
uart->res_base = request_region(io_base, 8, "Serial MIDI");
if (uart->res_base == NULL) {
if (!devm_request_region(uart->card->dev, io_base, 8, "Serial MIDI")) {
snd_printk(KERN_ERR "u16550: can't grab port 0x%lx\n", io_base);
return -EBUSY;
}
@ -752,21 +750,6 @@ static const struct snd_rawmidi_ops snd_uart16550_input =
.trigger = snd_uart16550_input_trigger,
};
static int snd_uart16550_free(struct snd_uart16550 *uart)
{
if (uart->irq >= 0)
free_irq(uart->irq, uart);
release_and_free_resource(uart->res_base);
kfree(uart);
return 0;
};
static int snd_uart16550_dev_free(struct snd_device *device)
{
struct snd_uart16550 *uart = device->device_data;
return snd_uart16550_free(uart);
}
static int snd_uart16550_create(struct snd_card *card,
unsigned long iobase,
int irq,
@ -776,14 +759,11 @@ static int snd_uart16550_create(struct snd_card *card,
int droponfull,
struct snd_uart16550 **ruart)
{
static const struct snd_device_ops ops = {
.dev_free = snd_uart16550_dev_free,
};
struct snd_uart16550 *uart;
int err;
uart = kzalloc(sizeof(*uart), GFP_KERNEL);
uart = devm_kzalloc(card->dev, sizeof(*uart), GFP_KERNEL);
if (!uart)
return -ENOMEM;
uart->adaptor = adaptor;
@ -796,13 +776,12 @@ static int snd_uart16550_create(struct snd_card *card,
err = snd_uart16550_detect(uart);
if (err <= 0) {
printk(KERN_ERR "no UART detected at 0x%lx\n", iobase);
snd_uart16550_free(uart);
return -ENODEV;
}
if (irq >= 0 && irq != SNDRV_AUTO_IRQ) {
if (request_irq(irq, snd_uart16550_interrupt,
0, "Serial MIDI", uart)) {
if (devm_request_irq(card->dev, irq, snd_uart16550_interrupt,
0, "Serial MIDI", uart)) {
snd_printk(KERN_WARNING
"irq %d busy. Using Polling.\n", irq);
} else {
@ -819,13 +798,6 @@ static int snd_uart16550_create(struct snd_card *card,
timer_setup(&uart->buffer_timer, snd_uart16550_buffer_timer, 0);
uart->timer_running = 0;
/* Register device */
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, uart, &ops);
if (err < 0) {
snd_uart16550_free(uart);
return err;
}
switch (uart->adaptor) {
case SNDRV_SERIAL_MS124W_SA:
case SNDRV_SERIAL_MS124W_MB:
@ -927,8 +899,8 @@ static int snd_serial_probe(struct platform_device *devptr)
return -ENODEV;
}
err = snd_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,
0, &card);
err = snd_devm_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE,
0, &card);
if (err < 0)
return err;
@ -939,11 +911,11 @@ static int snd_serial_probe(struct platform_device *devptr)
base[dev], adaptor[dev], droponfull[dev],
&uart);
if (err < 0)
goto _err;
return err;
err = snd_uart16550_rmidi(uart, 0, outs[dev], ins[dev], &uart->rmidi);
if (err < 0)
goto _err;
return err;
sprintf(card->longname, "%s [%s] at %#lx, irq %d",
card->shortname,
@ -953,27 +925,16 @@ static int snd_serial_probe(struct platform_device *devptr)
err = snd_card_register(card);
if (err < 0)
goto _err;
return err;
platform_set_drvdata(devptr, card);
return 0;
_err:
snd_card_free(card);
return err;
}
static int snd_serial_remove(struct platform_device *devptr)
{
snd_card_free(platform_get_drvdata(devptr));
return 0;
}
#define SND_SERIAL_DRIVER "snd_serial_u16550"
static struct platform_driver snd_serial_driver = {
.probe = snd_serial_probe,
.remove = snd_serial_remove,
.driver = {
.name = SND_SERIAL_DRIVER,
},