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ALSA: fireface: cease from delayed card registration

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The delayed registration of sound card instance brings less benefit than
complication of kobject management. This commit ceases from it.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210607081250.13397-9-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2021-06-07 17:12:49 +09:00 committed by Takashi Iwai
parent a49c6766df
commit ee5f0b32ce
2 changed files with 28 additions and 65 deletions
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90
sound/firewire/fireface/ff.c
View File

@ -42,22 +42,33 @@ static void ff_card_free(struct snd_card *card)
snd_ff_stream_destroy_duplex(ff);
snd_ff_transaction_unregister(ff);
mutex_destroy(&ff->mutex);
fw_unit_put(ff->unit);
}
static void do_registration(struct work_struct *work)
static int snd_ff_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry)
{
struct snd_ff *ff = container_of(work, struct snd_ff, dwork.work);
struct snd_card *card;
struct snd_ff *ff;
int err;
if (ff->registered)
return;
err = snd_card_new(&ff->unit->device, -1, NULL, THIS_MODULE, 0,
&ff->card);
err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*ff), &card);
if (err < 0)
return;
ff->card->private_free = ff_card_free;
ff->card->private_data = ff;
return err;
card->private_free = ff_card_free;
ff = card->private_data;
ff->unit = fw_unit_get(unit);
dev_set_drvdata(&unit->device, ff);
ff->card = card;
mutex_init(&ff->mutex);
spin_lock_init(&ff->lock);
init_waitqueue_head(&ff->hwdep_wait);
ff->unit_version = entry->version;
ff->spec = (const struct snd_ff_spec *)entry->driver_data;
err = snd_ff_transaction_register(ff);
if (err < 0)
@ -83,76 +94,31 @@ static void do_registration(struct work_struct *work)
if (err < 0)
goto error;
err = snd_card_register(ff->card);
err = snd_card_register(card);
if (err < 0)
goto error;
ff->registered = true;
return;
error:
snd_card_free(ff->card);
dev_info(&ff->unit->device,
"Sound card registration failed: %d\n", err);
}
static int snd_ff_probe(struct fw_unit *unit,
const struct ieee1394_device_id *entry)
{
struct snd_ff *ff;
ff = devm_kzalloc(&unit->device, sizeof(struct snd_ff), GFP_KERNEL);
if (!ff)
return -ENOMEM;
ff->unit = fw_unit_get(unit);
dev_set_drvdata(&unit->device, ff);
mutex_init(&ff->mutex);
spin_lock_init(&ff->lock);
init_waitqueue_head(&ff->hwdep_wait);
ff->unit_version = entry->version;
ff->spec = (const struct snd_ff_spec *)entry->driver_data;
/* Register this sound card later. */
INIT_DEFERRABLE_WORK(&ff->dwork, do_registration);
snd_fw_schedule_registration(unit, &ff->dwork);
return 0;
error:
snd_card_free(card);
return err;
}
static void snd_ff_update(struct fw_unit *unit)
{
struct snd_ff *ff = dev_get_drvdata(&unit->device);
/* Postpone a workqueue for deferred registration. */
if (!ff->registered)
snd_fw_schedule_registration(unit, &ff->dwork);
snd_ff_transaction_reregister(ff);
if (ff->registered)
snd_ff_stream_update_duplex(ff);
snd_ff_stream_update_duplex(ff);
}
static void snd_ff_remove(struct fw_unit *unit)
{
struct snd_ff *ff = dev_get_drvdata(&unit->device);
/*
* Confirm to stop the work for registration before the sound card is
* going to be released. The work is not scheduled again because bus
* reset handler is not called anymore.
*/
cancel_work_sync(&ff->dwork.work);
if (ff->registered) {
// Block till all of ALSA character devices are released.
snd_card_free(ff->card);
}
mutex_destroy(&ff->mutex);
fw_unit_put(ff->unit);
// Block till all of ALSA character devices are released.
snd_card_free(ff->card);
}
static const struct snd_ff_spec spec_ff800 = {

3
sound/firewire/fireface/ff.h
View File

@ -69,9 +69,6 @@ struct snd_ff {
struct mutex mutex;
spinlock_t lock;
bool registered;
struct delayed_work dwork;
enum snd_ff_unit_version unit_version;
const struct snd_ff_spec *spec;