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Mon, 7 Jun 2021 04:12:57 -0400 (EDT) From: Takashi Sakamoto To: tiwai@suse.de Subject: [PATCH 1/9] ALSA: bebob: cease from delayed card registration Date: Mon, 7 Jun 2021 17:12:42 +0900 Message-Id: <20210607081250.13397-2-o-takashi@sakamocchi.jp> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210607081250.13397-1-o-takashi@sakamocchi.jp> References: <20210607081250.13397-1-o-takashi@sakamocchi.jp> MIME-Version: 1.0 Cc: alsa-devel@alsa-project.org, clemens@ladisch.de X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" 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 --- sound/firewire/bebob/bebob.c | 159 +++++++++++++---------------------- sound/firewire/bebob/bebob.h | 4 - 2 files changed, 57 insertions(+), 106 deletions(-) diff --git a/sound/firewire/bebob/bebob.c b/sound/firewire/bebob/bebob.c index 5938aa325f5e..e7dd112c31c5 100644 --- a/sound/firewire/bebob/bebob.c +++ b/sound/firewire/bebob/bebob.c @@ -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 = { diff --git a/sound/firewire/bebob/bebob.h b/sound/firewire/bebob/bebob.h index cba6793bfdb2..edd93699ce1a 100644 --- a/sound/firewire/bebob/bebob.h +++ b/sound/firewire/bebob/bebob.h @@ -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;