From 3babca4555b20fc80aff4776662fb237257d9afd Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Wed, 10 Oct 2018 15:35:02 +0900 Subject: [PATCH] ALSA: firewire: simplify cleanup process when failing to register sound card In former commits, .private_free callback releases resources just for data transmission. This release function can be called without the resources are actually allocated in error paths. This commit applies a small refactoring to clean up codes in error paths. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/bebob/bebob.c | 27 +++++++-------------------- sound/firewire/dice/dice.c | 28 ++++++---------------------- sound/firewire/digi00x/digi00x.c | 17 ++++++----------- sound/firewire/fireface/ff.c | 17 ++++++----------- sound/firewire/fireworks/fireworks.c | 28 +++++++--------------------- sound/firewire/motu/motu.c | 28 ++++++---------------------- sound/firewire/oxfw/oxfw.c | 26 +++++--------------------- sound/firewire/tascam/tascam.c | 21 ++++++--------------- 8 files changed, 49 insertions(+), 143 deletions(-) diff --git a/sound/firewire/bebob/bebob.c b/sound/firewire/bebob/bebob.c index 3bc68499974a..672d13488454 100644 --- a/sound/firewire/bebob/bebob.c +++ b/sound/firewire/bebob/bebob.c @@ -126,8 +126,11 @@ name_device(struct snd_bebob *bebob) return err; } -static void bebob_free(struct snd_bebob *bebob) +static void +bebob_card_free(struct snd_card *card) { + struct snd_bebob *bebob = card->private_data; + mutex_lock(&devices_mutex); clear_bit(bebob->card_index, devices_used); mutex_unlock(&devices_mutex); @@ -135,18 +138,6 @@ static void bebob_free(struct snd_bebob *bebob) snd_bebob_stream_destroy_duplex(bebob); } -/* - * 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) -{ - bebob_free(card->private_data); -} - static const struct snd_bebob_spec * get_saffire_spec(struct fw_unit *unit) { @@ -202,6 +193,9 @@ do_registration(struct work_struct *work) set_bit(card_index, devices_used); mutex_unlock(&devices_mutex); + bebob->card->private_free = bebob_card_free; + bebob->card->private_data = bebob; + err = name_device(bebob); if (err < 0) goto error; @@ -241,17 +235,10 @@ do_registration(struct work_struct *work) if (err < 0) goto error; - /* - * After registered, bebob instance can be released corresponding to - * releasing the sound card instance. - */ - bebob->card->private_free = bebob_card_free; - bebob->card->private_data = bebob; bebob->registered = true; return; error: - snd_bebob_stream_destroy_duplex(bebob); snd_card_free(bebob->card); dev_info(&bebob->unit->device, "Sound card registration failed: %d\n", err); diff --git a/sound/firewire/dice/dice.c b/sound/firewire/dice/dice.c index c6b63e3f36a8..0f6dbcffe711 100644 --- a/sound/firewire/dice/dice.c +++ b/sound/firewire/dice/dice.c @@ -122,21 +122,12 @@ static void dice_card_strings(struct snd_dice *dice) strcpy(card->mixername, "DICE"); } -static void dice_free(struct snd_dice *dice) -{ - snd_dice_stream_destroy_duplex(dice); - snd_dice_transaction_destroy(dice); -} - -/* - * 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 dice_card_free(struct snd_card *card) { - dice_free(card->private_data); + struct snd_dice *dice = card->private_data; + + snd_dice_stream_destroy_duplex(dice); + snd_dice_transaction_destroy(dice); } static void do_registration(struct work_struct *work) @@ -151,6 +142,8 @@ static void do_registration(struct work_struct *work) &dice->card); if (err < 0) return; + dice->card->private_free = dice_card_free; + dice->card->private_data = dice; err = snd_dice_transaction_init(dice); if (err < 0) @@ -188,19 +181,10 @@ static void do_registration(struct work_struct *work) if (err < 0) goto error; - /* - * After registered, dice instance can be released corresponding to - * releasing the sound card instance. - */ - dice->card->private_free = dice_card_free; - dice->card->private_data = dice; dice->registered = true; return; error: - snd_dice_stream_destroy_duplex(dice); - snd_dice_transaction_destroy(dice); - snd_dice_stream_destroy_duplex(dice); snd_card_free(dice->card); dev_info(&dice->unit->device, "Sound card registration failed: %d\n", err); diff --git a/sound/firewire/digi00x/digi00x.c b/sound/firewire/digi00x/digi00x.c index 7a24348968b9..6c6ea149ef6b 100644 --- a/sound/firewire/digi00x/digi00x.c +++ b/sound/firewire/digi00x/digi00x.c @@ -41,15 +41,12 @@ static int name_card(struct snd_dg00x *dg00x) return 0; } -static void dg00x_free(struct snd_dg00x *dg00x) -{ - snd_dg00x_stream_destroy_duplex(dg00x); - snd_dg00x_transaction_unregister(dg00x); -} - static void dg00x_card_free(struct snd_card *card) { - dg00x_free(card->private_data); + struct snd_dg00x *dg00x = card->private_data; + + snd_dg00x_stream_destroy_duplex(dg00x); + snd_dg00x_transaction_unregister(dg00x); } static void do_registration(struct work_struct *work) @@ -65,6 +62,8 @@ static void do_registration(struct work_struct *work) &dg00x->card); if (err < 0) return; + dg00x->card->private_free = dg00x_card_free; + dg00x->card->private_data = dg00x; err = name_card(dg00x); if (err < 0) @@ -96,14 +95,10 @@ static void do_registration(struct work_struct *work) if (err < 0) goto error; - dg00x->card->private_free = dg00x_card_free; - dg00x->card->private_data = dg00x; dg00x->registered = true; return; error: - snd_dg00x_transaction_unregister(dg00x); - snd_dg00x_stream_destroy_duplex(dg00x); snd_card_free(dg00x->card); dev_info(&dg00x->unit->device, "Sound card registration failed: %d\n", err); diff --git a/sound/firewire/fireface/ff.c b/sound/firewire/fireface/ff.c index 37866beeb160..3f61cfeace69 100644 --- a/sound/firewire/fireface/ff.c +++ b/sound/firewire/fireface/ff.c @@ -27,15 +27,12 @@ static void name_card(struct snd_ff *ff) dev_name(&ff->unit->device), 100 << fw_dev->max_speed); } -static void ff_free(struct snd_ff *ff) -{ - snd_ff_stream_destroy_duplex(ff); - snd_ff_transaction_unregister(ff); -} - static void ff_card_free(struct snd_card *card) { - ff_free(card->private_data); + struct snd_ff *ff = card->private_data; + + snd_ff_stream_destroy_duplex(ff); + snd_ff_transaction_unregister(ff); } static void do_registration(struct work_struct *work) @@ -50,6 +47,8 @@ static void do_registration(struct work_struct *work) &ff->card); if (err < 0) return; + ff->card->private_free = ff_card_free; + ff->card->private_data = ff; err = snd_ff_transaction_register(ff); if (err < 0) @@ -79,14 +78,10 @@ static void do_registration(struct work_struct *work) if (err < 0) goto error; - ff->card->private_free = ff_card_free; - ff->card->private_data = ff; ff->registered = true; return; error: - snd_ff_transaction_unregister(ff); - snd_ff_stream_destroy_duplex(ff); snd_card_free(ff->card); dev_info(&ff->unit->device, "Sound card registration failed: %d\n", err); diff --git a/sound/firewire/fireworks/fireworks.c b/sound/firewire/fireworks/fireworks.c index da0c31033821..faf0e001c4c5 100644 --- a/sound/firewire/fireworks/fireworks.c +++ b/sound/firewire/fireworks/fireworks.c @@ -184,8 +184,11 @@ get_hardware_info(struct snd_efw *efw) return err; } -static void efw_free(struct snd_efw *efw) +static void +efw_card_free(struct snd_card *card) { + struct snd_efw *efw = card->private_data; + mutex_lock(&devices_mutex); clear_bit(efw->card_index, devices_used); mutex_unlock(&devices_mutex); @@ -194,18 +197,6 @@ static void efw_free(struct snd_efw *efw) snd_efw_transaction_remove_instance(efw); } -/* - * 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 -efw_card_free(struct snd_card *card) -{ - efw_free(card->private_data); -} - static void do_registration(struct work_struct *work) { @@ -236,6 +227,9 @@ do_registration(struct work_struct *work) set_bit(card_index, devices_used); mutex_unlock(&devices_mutex); + efw->card->private_free = efw_card_free; + efw->card->private_data = efw; + /* prepare response buffer */ snd_efw_resp_buf_size = clamp(snd_efw_resp_buf_size, SND_EFW_RESPONSE_MAXIMUM_BYTES, 4096U); @@ -276,18 +270,10 @@ do_registration(struct work_struct *work) if (err < 0) goto error; - /* - * After registered, efw instance can be released corresponding to - * releasing the sound card instance. - */ - efw->card->private_free = efw_card_free; - efw->card->private_data = efw; efw->registered = true; return; error: - snd_efw_transaction_remove_instance(efw); - snd_efw_stream_destroy_duplex(efw); snd_card_free(efw->card); dev_info(&efw->unit->device, "Sound card registration failed: %d\n", err); diff --git a/sound/firewire/motu/motu.c b/sound/firewire/motu/motu.c index 281028ee3273..220e61926ea4 100644 --- a/sound/firewire/motu/motu.c +++ b/sound/firewire/motu/motu.c @@ -52,22 +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) -{ - snd_motu_transaction_unregister(motu); - - snd_motu_stream_destroy_duplex(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); + struct snd_motu *motu = card->private_data; + + snd_motu_transaction_unregister(motu); + snd_motu_stream_destroy_duplex(motu); } static void do_registration(struct work_struct *work) @@ -82,6 +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); @@ -116,18 +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); diff --git a/sound/firewire/oxfw/oxfw.c b/sound/firewire/oxfw/oxfw.c index 14fe02a9ed5d..afb78d90384b 100644 --- a/sound/firewire/oxfw/oxfw.c +++ b/sound/firewire/oxfw/oxfw.c @@ -113,24 +113,15 @@ static int name_card(struct snd_oxfw *oxfw) return err; } -static void oxfw_free(struct snd_oxfw *oxfw) +static void oxfw_card_free(struct snd_card *card) { + struct snd_oxfw *oxfw = card->private_data; + snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream); if (oxfw->has_output) snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream); } -/* - * 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 oxfw_card_free(struct snd_card *card) -{ - oxfw_free(card->private_data); -} - static int detect_quirks(struct snd_oxfw *oxfw) { struct fw_device *fw_dev = fw_parent_device(oxfw->unit); @@ -204,6 +195,8 @@ static void do_registration(struct work_struct *work) &oxfw->card); if (err < 0) return; + oxfw->card->private_free = oxfw_card_free; + oxfw->card->private_data = oxfw; err = name_card(oxfw); if (err < 0) @@ -244,19 +237,10 @@ static void do_registration(struct work_struct *work) if (err < 0) goto error; - /* - * After registered, oxfw instance can be released corresponding to - * releasing the sound card instance. - */ - oxfw->card->private_free = oxfw_card_free; - oxfw->card->private_data = oxfw; oxfw->registered = true; return; error: - snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream); - if (oxfw->has_output) - snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream); snd_card_free(oxfw->card); dev_info(&oxfw->unit->device, "Sound card registration failed: %d\n", err); diff --git a/sound/firewire/tascam/tascam.c b/sound/firewire/tascam/tascam.c index f4f959128341..ef57fa4db323 100644 --- a/sound/firewire/tascam/tascam.c +++ b/sound/firewire/tascam/tascam.c @@ -85,15 +85,12 @@ static int identify_model(struct snd_tscm *tscm) return 0; } -static void tscm_free(struct snd_tscm *tscm) -{ - snd_tscm_transaction_unregister(tscm); - snd_tscm_stream_destroy_duplex(tscm); -} - static void tscm_card_free(struct snd_card *card) { - tscm_free(card->private_data); + struct snd_tscm *tscm = card->private_data; + + snd_tscm_transaction_unregister(tscm); + snd_tscm_stream_destroy_duplex(tscm); } static void do_registration(struct work_struct *work) @@ -105,6 +102,8 @@ static void do_registration(struct work_struct *work) &tscm->card); if (err < 0) return; + tscm->card->private_free = tscm_card_free; + tscm->card->private_data = tscm; err = identify_model(tscm); if (err < 0) @@ -136,18 +135,10 @@ static void do_registration(struct work_struct *work) if (err < 0) goto error; - /* - * After registered, tscm instance can be released corresponding to - * releasing the sound card instance. - */ - tscm->card->private_free = tscm_card_free; - tscm->card->private_data = tscm; tscm->registered = true; return; error: - snd_tscm_transaction_unregister(tscm); - snd_tscm_stream_destroy_duplex(tscm); snd_card_free(tscm->card); dev_info(&tscm->unit->device, "Sound card registration failed: %d\n", err);