diff options
-rw-r--r-- | sound/firewire/fireface/ff.c | 84 | ||||
-rw-r--r-- | sound/firewire/fireface/ff.h | 5 |
2 files changed, 67 insertions, 22 deletions
diff --git a/sound/firewire/fireface/ff.c b/sound/firewire/fireface/ff.c index 358bba23deeb..7c026396b8b5 100644 --- a/sound/firewire/fireface/ff.c +++ b/sound/firewire/fireface/ff.c @@ -28,58 +28,98 @@ static void name_card(struct snd_ff *ff) dev_name(&ff->unit->device), 100 << fw_dev->max_speed); } -static void ff_card_free(struct snd_card *card) +static void ff_free(struct snd_ff *ff) { - struct snd_ff *ff = card->private_data; - fw_unit_put(ff->unit); mutex_destroy(&ff->mutex); + kfree(ff); +} + +static void ff_card_free(struct snd_card *card) +{ + ff_free(card->private_data); +} + +static void do_registration(struct work_struct *work) +{ + struct snd_ff *ff = container_of(work, struct snd_ff, dwork.work); + int err; + + if (ff->registered) + return; + + err = snd_card_new(&ff->unit->device, -1, NULL, THIS_MODULE, 0, + &ff->card); + if (err < 0) + return; + + name_card(ff); + + err = snd_card_register(ff->card); + if (err < 0) + goto error; + + ff->card->private_free = ff_card_free; + ff->card->private_data = ff; + 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_card *card; struct snd_ff *ff; - int err; - err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, - sizeof(struct snd_ff), &card); - if (err < 0) - return err; - card->private_free = ff_card_free; + ff = kzalloc(sizeof(struct snd_ff), GFP_KERNEL); + if (ff == NULL) + return -ENOMEM; /* initialize myself */ - ff = card->private_data; - ff->card = card; ff->unit = fw_unit_get(unit); dev_set_drvdata(&unit->device, ff); mutex_init(&ff->mutex); - name_card(ff); - - err = snd_card_register(card); - if (err < 0) { - snd_card_free(card); - return err; - } + /* Register this sound card later. */ + INIT_DEFERRABLE_WORK(&ff->dwork, do_registration); + snd_fw_schedule_registration(unit, &ff->dwork); return 0; } static void snd_ff_update(struct fw_unit *unit) { - return; + 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); } static void snd_ff_remove(struct fw_unit *unit) { struct snd_ff *ff = dev_get_drvdata(&unit->device); - /* No need to wait for releasing card object in this context. */ - snd_card_free_when_closed(ff->card); + /* + * 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) { + /* No need to wait for releasing card object in this context. */ + snd_card_free_when_closed(ff->card); + } else { + /* Don't forget this case. */ + ff_free(ff); + } } static const struct ieee1394_device_id snd_ff_id_table[] = { diff --git a/sound/firewire/fireface/ff.h b/sound/firewire/fireface/ff.h index 64d488ec8264..a0faae18018a 100644 --- a/sound/firewire/fireface/ff.h +++ b/sound/firewire/fireface/ff.h @@ -20,9 +20,14 @@ #include <sound/core.h> +#include "../lib.h" + struct snd_ff { struct snd_card *card; struct fw_unit *unit; struct mutex mutex; + + bool registered; + struct delayed_work dwork; }; #endif |