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ALSA: hwdep: Don't embed device

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Like control and PCM devices, it's better to avoid the embedded struct
device for hwdep (although it's more or less well working), too.
Change it to allocate via snd_device_alloc(), and free the memory at
the common snd_hwdep_free().

Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Curtis Malainey <cujomalainey@chromium.org>
Tested-by: Curtis Malainey <cujomalainey@chromium.org>
Link: https://lore.kernel.org/r/20230816160252.23396-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2023-08-16 18:02:47 +02:00
parent bc41a7228c
commit 897c8882df
3 changed files with 24 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/sound/hwdep.h
View File

@ -53,7 +53,7 @@ struct snd_hwdep {
wait_queue_head_t open_wait;
void *private_data;
void (*private_free) (struct snd_hwdep *hwdep);
struct device dev;
struct device *dev;
struct mutex open_mutex;
int used; /* reference counter */

38
sound/core/hwdep.c
View File

@ -338,9 +338,14 @@ static const struct file_operations snd_hwdep_f_ops =
.mmap = snd_hwdep_mmap,
};
static void release_hwdep_device(struct device *dev)
static void snd_hwdep_free(struct snd_hwdep *hwdep)
{
kfree(container_of(dev, struct snd_hwdep, dev));
if (!hwdep)
return;
if (hwdep->private_free)
hwdep->private_free(hwdep);
put_device(hwdep->dev);
kfree(hwdep);
}
/**
@ -382,16 +387,20 @@ int snd_hwdep_new(struct snd_card *card, char *id, int device,
if (id)
strscpy(hwdep->id, id, sizeof(hwdep->id));
snd_device_initialize(&hwdep->dev, card);
hwdep->dev.release = release_hwdep_device;
dev_set_name(&hwdep->dev, "hwC%iD%i", card->number, device);
err = snd_device_alloc(&hwdep->dev, card);
if (err < 0) {
snd_hwdep_free(hwdep);
return err;
}
dev_set_name(hwdep->dev, "hwC%iD%i", card->number, device);
#ifdef CONFIG_SND_OSSEMUL
hwdep->oss_type = -1;
#endif
err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops);
if (err < 0) {
put_device(&hwdep->dev);
snd_hwdep_free(hwdep);
return err;
}
@ -403,12 +412,7 @@ EXPORT_SYMBOL(snd_hwdep_new);
static int snd_hwdep_dev_free(struct snd_device *device)
{
struct snd_hwdep *hwdep = device->device_data;
if (!hwdep)
return 0;
if (hwdep->private_free)
hwdep->private_free(hwdep);
put_device(&hwdep->dev);
snd_hwdep_free(device->device_data);
return 0;
}
@ -426,9 +430,9 @@ static int snd_hwdep_dev_register(struct snd_device *device)
list_add_tail(&hwdep->list, &snd_hwdep_devices);
err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP,
hwdep->card, hwdep->device,
&snd_hwdep_f_ops, hwdep, &hwdep->dev);
&snd_hwdep_f_ops, hwdep, hwdep->dev);
if (err < 0) {
dev_err(&hwdep->dev, "unable to register\n");
dev_err(hwdep->dev, "unable to register\n");
list_del(&hwdep->list);
mutex_unlock(&register_mutex);
return err;
@ -439,12 +443,12 @@ static int snd_hwdep_dev_register(struct snd_device *device)
if (hwdep->oss_type >= 0) {
if (hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM &&
hwdep->device)
dev_warn(&hwdep->dev,
dev_warn(hwdep->dev,
"only hwdep device 0 can be registered as OSS direct FM device!\n");
else if (snd_register_oss_device(hwdep->oss_type,
card, hwdep->device,
&snd_hwdep_f_ops, hwdep) < 0)
dev_warn(&hwdep->dev,
dev_warn(hwdep->dev,
"unable to register OSS compatibility device\n");
else
hwdep->ossreg = 1;
@ -471,7 +475,7 @@ static int snd_hwdep_dev_disconnect(struct snd_device *device)
if (hwdep->ossreg)
snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device);
#endif
snd_unregister_device(&hwdep->dev);
snd_unregister_device(hwdep->dev);
list_del_init(&hwdep->list);
mutex_unlock(&hwdep->open_mutex);
mutex_unlock(&register_mutex);

4
sound/pci/hda/hda_hwdep.c
View File

@ -114,8 +114,8 @@ int snd_hda_create_hwdep(struct hda_codec *codec)
#endif
/* for sysfs */
hwdep->dev.groups = snd_hda_dev_attr_groups;
dev_set_drvdata(&hwdep->dev, codec);
hwdep->dev->groups = snd_hda_dev_attr_groups;
dev_set_drvdata(hwdep->dev, codec);
return 0;
}