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Diffstat (limited to 'sound/firewire/bebob/bebob.c')
-rw-r--r--sound/firewire/bebob/bebob.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/sound/firewire/bebob/bebob.c b/sound/firewire/bebob/bebob.c
index fc19c99654aa..611b7dae7ee5 100644
--- a/sound/firewire/bebob/bebob.c
+++ b/sound/firewire/bebob/bebob.c
@@ -116,11 +116,22 @@ end:
return err;
}
+/*
+ * 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
bebob_card_free(struct snd_card *card)
{
struct snd_bebob *bebob = card->private_data;
+ snd_bebob_stream_destroy_duplex(bebob);
+ fw_unit_put(bebob->unit);
+
+ kfree(bebob->maudio_special_quirk);
+
if (bebob->card_index >= 0) {
mutex_lock(&devices_mutex);
clear_bit(bebob->card_index, devices_used);
@@ -205,7 +216,7 @@ bebob_probe(struct fw_unit *unit,
card->private_free = bebob_card_free;
bebob->card = card;
- bebob->unit = unit;
+ bebob->unit = fw_unit_get(unit);
bebob->spec = spec;
mutex_init(&bebob->mutex);
spin_lock_init(&bebob->lock);
@@ -306,10 +317,11 @@ static void bebob_remove(struct fw_unit *unit)
if (bebob == NULL)
return;
- kfree(bebob->maudio_special_quirk);
+ /* Awake bus-reset waiters. */
+ if (!completion_done(&bebob->bus_reset))
+ complete_all(&bebob->bus_reset);
- snd_bebob_stream_destroy_duplex(bebob);
- snd_card_disconnect(bebob->card);
+ /* No need to wait for releasing card object in this context. */
snd_card_free_when_closed(bebob->card);
}