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ALSA: bebob: cease from delayed card registration 

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/20210607081250.13397-2-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2021-06-07 17:12:42 +09:00 committed by Takashi Iwai
parent 64584f3293
commit 81bfb89eed
2 changed files with 57 additions and 106 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

159
sound/firewire/bebob/bebob.c
View File

@ -136,6 +136,9 @@ bebob_card_free(struct snd_card *card)
mutex_unlock(&devices_mutex);
snd_bebob_stream_destroy_duplex(bebob);
mutex_destroy(&bebob->mutex);
fw_unit_put(bebob->unit);
}
static const struct snd_bebob_spec *
@ -163,16 +166,30 @@ check_audiophile_booted(struct fw_unit *unit)
return strncmp(name, "FW Audiophile Bootloader", 24) != 0;
}
static void
do_registration(struct work_struct *work)
static int bebob_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry)
{
struct snd_bebob *bebob =
container_of(work, struct snd_bebob, dwork.work);
unsigned int card_index;
struct snd_card *card;
struct snd_bebob *bebob;
const struct snd_bebob_spec *spec;
int err;
if (bebob->registered)
return;
if (entry->vendor_id == VEN_FOCUSRITE &&
entry->model_id == MODEL_FOCUSRITE_SAFFIRE_BOTH)
spec = get_saffire_spec(unit);
else if (entry->vendor_id == VEN_MAUDIO1 &&
entry->model_id == MODEL_MAUDIO_AUDIOPHILE_BOTH &&
!check_audiophile_booted(unit))
spec = NULL;
else
spec = (const struct snd_bebob_spec *)entry->driver_data;
if (spec == NULL) {
if (entry->vendor_id == VEN_MAUDIO1 || entry->vendor_id == VEN_MAUDIO2)
return snd_bebob_maudio_load_firmware(unit);
else
return -ENODEV;
}
mutex_lock(&devices_mutex);
for (card_index = 0; card_index < SNDRV_CARDS; card_index++) {
@ -181,27 +198,36 @@ do_registration(struct work_struct *work)
}
if (card_index >= SNDRV_CARDS) {
mutex_unlock(&devices_mutex);
return;
return -ENOENT;
}
err = snd_card_new(&bebob->unit->device, index[card_index],
id[card_index], THIS_MODULE, 0, &bebob->card);
err = snd_card_new(&unit->device, index[card_index], id[card_index], THIS_MODULE,
sizeof(*bebob), &card);
if (err < 0) {
mutex_unlock(&devices_mutex);
return;
return err;
}
card->private_free = bebob_card_free;
set_bit(card_index, devices_used);
mutex_unlock(&devices_mutex);
bebob->card->private_free = bebob_card_free;
bebob->card->private_data = bebob;
bebob = card->private_data;
bebob->unit = fw_unit_get(unit);
dev_set_drvdata(&unit->device, bebob);
bebob->card = card;
bebob->card_index = card_index;
bebob->spec = spec;
mutex_init(&bebob->mutex);
spin_lock_init(&bebob->lock);
init_waitqueue_head(&bebob->hwdep_wait);
err = name_device(bebob);
if (err < 0)
goto error;
if (bebob->spec == &maudio_special_spec) {
if (bebob->entry->model_id == MODEL_MAUDIO_FW1814)
if (entry->model_id == MODEL_MAUDIO_FW1814)
err = snd_bebob_maudio_special_discover(bebob, true);
else
err = snd_bebob_maudio_special_discover(bebob, false);
@ -214,8 +240,7 @@ do_registration(struct work_struct *work)
// M-Audio ProFire Lightbridge has a quirk to transfer packets with discontinuous cycle or
// data block counter in early stage of packet streaming. The cycle span from the first
// packet with event is variable.
if (bebob->entry->vendor_id == VEN_MAUDIO1 &&
bebob->entry->model_id == MODEL_MAUDIO_PROFIRELIGHTBRIDGE)
if (entry->vendor_id == VEN_MAUDIO1 && entry->model_id == MODEL_MAUDIO_PROFIRELIGHTBRIDGE)
bebob->discontinuity_quirk = true;
err = snd_bebob_stream_init_duplex(bebob);
@ -238,80 +263,26 @@ do_registration(struct work_struct *work)
if (err < 0)
goto error;
err = snd_card_register(bebob->card);
err = snd_card_register(card);
if (err < 0)
goto error;
bebob->registered = true;
return;
error:
snd_card_free(bebob->card);
dev_info(&bebob->unit->device,
"Sound card registration failed: %d\n", err);
}
static int
bebob_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry)
{
struct snd_bebob *bebob;
const struct snd_bebob_spec *spec;
if (entry->vendor_id == VEN_FOCUSRITE &&
entry->model_id == MODEL_FOCUSRITE_SAFFIRE_BOTH)
spec = get_saffire_spec(unit);
else if (entry->vendor_id == VEN_MAUDIO1 &&
entry->model_id == MODEL_MAUDIO_AUDIOPHILE_BOTH &&
!check_audiophile_booted(unit))
spec = NULL;
else
spec = (const struct snd_bebob_spec *)entry->driver_data;
if (spec == NULL) {
if (entry->vendor_id == VEN_MAUDIO1 ||
entry->vendor_id == VEN_MAUDIO2)
return snd_bebob_maudio_load_firmware(unit);
else
return -ENODEV;
}
/* Allocate this independent of sound card instance. */
bebob = devm_kzalloc(&unit->device, sizeof(struct snd_bebob),
GFP_KERNEL);
if (!bebob)
return -ENOMEM;
bebob->unit = fw_unit_get(unit);
dev_set_drvdata(&unit->device, bebob);
bebob->entry = entry;
bebob->spec = spec;
mutex_init(&bebob->mutex);
spin_lock_init(&bebob->lock);
init_waitqueue_head(&bebob->hwdep_wait);
/* Allocate and register this sound card later. */
INIT_DEFERRABLE_WORK(&bebob->dwork, do_registration);
if (entry->vendor_id != VEN_MAUDIO1 ||
(entry->model_id != MODEL_MAUDIO_FW1814 &&
entry->model_id != MODEL_MAUDIO_PROJECTMIX)) {
snd_fw_schedule_registration(unit, &bebob->dwork);
} else {
/*
* This is a workaround. This bus reset seems to have an effect
* to make devices correctly handling transactions. Without
* this, the devices have gap_count mismatch. This causes much
* failure of transaction.
*
* Just after registration, user-land application receive
* signals from dbus and starts I/Os. To avoid I/Os till the
* future bus reset, registration is done in next update().
*/
fw_schedule_bus_reset(fw_parent_device(bebob->unit)->card,
false, true);
if (entry->vendor_id == VEN_MAUDIO1 &&
(entry->model_id == MODEL_MAUDIO_FW1814 || entry->model_id == MODEL_MAUDIO_PROJECTMIX)) {
// This is a workaround. This bus reset seems to have an effect to make devices
// correctly handling transactions. Without this, the devices have gap_count
// mismatch. This causes much failure of transaction.
//
// Just after registration, user-land application receive signals from dbus and
// starts I/Os. To avoid I/Os till the future bus reset, registration is done in
// next update().
fw_schedule_bus_reset(fw_parent_device(bebob->unit)->card, false, true);
}
return 0;
error:
snd_card_free(card);
return err;
}
/*
@ -338,11 +309,7 @@ bebob_update(struct fw_unit *unit)
if (bebob == NULL)
return;
/* Postpone a workqueue for deferred registration. */
if (!bebob->registered)
snd_fw_schedule_registration(unit, &bebob->dwork);
else
fcp_bus_reset(bebob->unit);
fcp_bus_reset(bebob->unit);
}
static void bebob_remove(struct fw_unit *unit)
@ -352,20 +319,8 @@ static void bebob_remove(struct fw_unit *unit)
if (bebob == NULL)
return;
/*
* 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_delayed_work_sync(&bebob->dwork);
if (bebob->registered) {
// Block till all of ALSA character devices are released.
snd_card_free(bebob->card);
}
mutex_destroy(&bebob->mutex);
fw_unit_put(bebob->unit);
// Block till all of ALSA character devices are released.
snd_card_free(bebob->card);
}
static const struct snd_bebob_rate_spec normal_rate_spec = {

4
sound/firewire/bebob/bebob.h
View File

@ -83,10 +83,6 @@ struct snd_bebob {
struct mutex mutex;
spinlock_t lock;
bool registered;
struct delayed_work dwork;
const struct ieee1394_device_id *entry;
const struct snd_bebob_spec *spec;
unsigned int midi_input_ports;