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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2021-06-07 11:12:47 +0300
committerTakashi Iwai <tiwai@suse.de>2021-06-07 18:14:36 +0300
commit7ae2f179a42d7a15a84e238eb1d177ca2c79f954 (patch)
treeeb9310e79b0add25d59dc28cc30af58d31cf67e8 /sound/firewire
parent9067c181c3a528fc5e2da1e9f298c46091eafc3d (diff)
downloadlinux-7ae2f179a42d7a15a84e238eb1d177ca2c79f954.tar.xz
ALSA: firewire-tascam: 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/20210607081250.13397-7-o-takashi@sakamocchi.jp Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire')
-rw-r--r--sound/firewire/tascam/tascam.c92
-rw-r--r--sound/firewire/tascam/tascam.h2
2 files changed, 28 insertions, 66 deletions
diff --git a/sound/firewire/tascam/tascam.c b/sound/firewire/tascam/tascam.c
index 75f2edd8e78f..eb58d3fcf087 100644
--- a/sound/firewire/tascam/tascam.c
+++ b/sound/firewire/tascam/tascam.c
@@ -90,19 +90,31 @@ static void tscm_card_free(struct snd_card *card)
snd_tscm_transaction_unregister(tscm);
snd_tscm_stream_destroy_duplex(tscm);
+
+ mutex_destroy(&tscm->mutex);
+ fw_unit_put(tscm->unit);
}
-static void do_registration(struct work_struct *work)
+static int snd_tscm_probe(struct fw_unit *unit,
+ const struct ieee1394_device_id *entry)
{
- struct snd_tscm *tscm = container_of(work, struct snd_tscm, dwork.work);
+ struct snd_card *card;
+ struct snd_tscm *tscm;
int err;
- err = snd_card_new(&tscm->unit->device, -1, NULL, THIS_MODULE, 0,
- &tscm->card);
+ err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*tscm), &card);
if (err < 0)
- return;
- tscm->card->private_free = tscm_card_free;
- tscm->card->private_data = tscm;
+ return err;
+ card->private_free = tscm_card_free;
+
+ tscm = card->private_data;
+ tscm->unit = fw_unit_get(unit);
+ dev_set_drvdata(&unit->device, tscm);
+ tscm->card = card;
+
+ mutex_init(&tscm->mutex);
+ spin_lock_init(&tscm->lock);
+ init_waitqueue_head(&tscm->hwdep_wait);
err = identify_model(tscm);
if (err < 0)
@@ -130,81 +142,33 @@ static void do_registration(struct work_struct *work)
if (err < 0)
goto error;
- err = snd_card_register(tscm->card);
+ err = snd_card_register(card);
if (err < 0)
goto error;
- tscm->registered = true;
-
- return;
-error:
- snd_card_free(tscm->card);
- dev_info(&tscm->unit->device,
- "Sound card registration failed: %d\n", err);
-}
-
-static int snd_tscm_probe(struct fw_unit *unit,
- const struct ieee1394_device_id *entry)
-{
- struct snd_tscm *tscm;
-
- /* Allocate this independent of sound card instance. */
- tscm = devm_kzalloc(&unit->device, sizeof(struct snd_tscm), GFP_KERNEL);
- if (!tscm)
- return -ENOMEM;
- tscm->unit = fw_unit_get(unit);
- dev_set_drvdata(&unit->device, tscm);
-
- mutex_init(&tscm->mutex);
- spin_lock_init(&tscm->lock);
- init_waitqueue_head(&tscm->hwdep_wait);
-
- /* Allocate and register this sound card later. */
- INIT_DEFERRABLE_WORK(&tscm->dwork, do_registration);
- snd_fw_schedule_registration(unit, &tscm->dwork);
-
return 0;
+error:
+ snd_card_free(card);
+ return err;
}
static void snd_tscm_update(struct fw_unit *unit)
{
struct snd_tscm *tscm = dev_get_drvdata(&unit->device);
- /* Postpone a workqueue for deferred registration. */
- if (!tscm->registered)
- snd_fw_schedule_registration(unit, &tscm->dwork);
-
snd_tscm_transaction_reregister(tscm);
- /*
- * After registration, userspace can start packet streaming, then this
- * code block works fine.
- */
- if (tscm->registered) {
- mutex_lock(&tscm->mutex);
- snd_tscm_stream_update_duplex(tscm);
- mutex_unlock(&tscm->mutex);
- }
+ mutex_lock(&tscm->mutex);
+ snd_tscm_stream_update_duplex(tscm);
+ mutex_unlock(&tscm->mutex);
}
static void snd_tscm_remove(struct fw_unit *unit)
{
struct snd_tscm *tscm = 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_delayed_work_sync(&tscm->dwork);
-
- if (tscm->registered) {
- // Block till all of ALSA character devices are released.
- snd_card_free(tscm->card);
- }
-
- mutex_destroy(&tscm->mutex);
- fw_unit_put(tscm->unit);
+ // Block till all of ALSA character devices are released.
+ snd_card_free(tscm->card);
}
static const struct ieee1394_device_id snd_tscm_id_table[] = {
diff --git a/sound/firewire/tascam/tascam.h b/sound/firewire/tascam/tascam.h
index 28dad4eae9c9..d07ffcb27be6 100644
--- a/sound/firewire/tascam/tascam.h
+++ b/sound/firewire/tascam/tascam.h
@@ -70,8 +70,6 @@ struct snd_tscm {
struct mutex mutex;
spinlock_t lock;
- bool registered;
- struct delayed_work dwork;
const struct snd_tscm_spec *spec;
struct fw_iso_resources tx_resources;