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-rw-r--r--sound/firewire/motu/motu.c47
1 files changed, 13 insertions, 34 deletions
diff --git a/sound/firewire/motu/motu.c b/sound/firewire/motu/motu.c
index 300d31b6f191..220e61926ea4 100644
--- a/sound/firewire/motu/motu.c
+++ b/sound/firewire/motu/motu.c
@@ -52,26 +52,12 @@ static void name_card(struct snd_motu *motu)
dev_name(&motu->unit->device), 100 << fw_dev->max_speed);
}
-static void motu_free(struct snd_motu *motu)
+static void motu_card_free(struct snd_card *card)
{
- snd_motu_transaction_unregister(motu);
+ struct snd_motu *motu = card->private_data;
+ snd_motu_transaction_unregister(motu);
snd_motu_stream_destroy_duplex(motu);
- fw_unit_put(motu->unit);
-
- mutex_destroy(&motu->mutex);
- kfree(motu);
-}
-
-/*
- * This module releases the FireWire unit data after all ALSA character devices
- * are released by applications. This is for releasing stream data or finishing
- * transactions safely. Thus at returning from .remove(), this module still keep
- * references for the unit.
- */
-static void motu_card_free(struct snd_card *card)
-{
- motu_free(card->private_data);
}
static void do_registration(struct work_struct *work)
@@ -86,6 +72,8 @@ static void do_registration(struct work_struct *work)
&motu->card);
if (err < 0)
return;
+ motu->card->private_free = motu_card_free;
+ motu->card->private_data = motu;
name_card(motu);
@@ -120,18 +108,10 @@ static void do_registration(struct work_struct *work)
if (err < 0)
goto error;
- /*
- * After registered, motu instance can be released corresponding to
- * releasing the sound card instance.
- */
- motu->card->private_free = motu_card_free;
- motu->card->private_data = motu;
motu->registered = true;
return;
error:
- snd_motu_transaction_unregister(motu);
- snd_motu_stream_destroy_duplex(motu);
snd_card_free(motu->card);
dev_info(&motu->unit->device,
"Sound card registration failed: %d\n", err);
@@ -143,14 +123,13 @@ static int motu_probe(struct fw_unit *unit,
struct snd_motu *motu;
/* Allocate this independently of sound card instance. */
- motu = kzalloc(sizeof(struct snd_motu), GFP_KERNEL);
- if (motu == NULL)
+ motu = devm_kzalloc(&unit->device, sizeof(struct snd_motu), GFP_KERNEL);
+ if (!motu)
return -ENOMEM;
-
- motu->spec = (const struct snd_motu_spec *)entry->driver_data;
motu->unit = fw_unit_get(unit);
dev_set_drvdata(&unit->device, motu);
+ motu->spec = (const struct snd_motu_spec *)entry->driver_data;
mutex_init(&motu->mutex);
spin_lock_init(&motu->lock);
init_waitqueue_head(&motu->hwdep_wait);
@@ -174,12 +153,12 @@ static void motu_remove(struct fw_unit *unit)
cancel_delayed_work_sync(&motu->dwork);
if (motu->registered) {
- /* No need to wait for releasing card object in this context. */
- snd_card_free_when_closed(motu->card);
- } else {
- /* Don't forget this case. */
- motu_free(motu);
+ // Block till all of ALSA character devices are released.
+ snd_card_free(motu->card);
}
+
+ mutex_destroy(&motu->mutex);
+ fw_unit_put(motu->unit);
}
static void motu_bus_update(struct fw_unit *unit)