From 901401166464dc1875825235bb2541af31b4c384 Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Tue, 22 Jul 2014 23:11:03 +0900 Subject: ALSA: bebob: Fix a missing to unlock mutex in error handling case In error handling case, special_clk_ctl_put() returns without unlock_mutex(), therefore the mutex is still locked. This commit moves mutex_lock() after the error handling case. This commit is my solution for this post. [PATCH -next] ALSA: bebob: Fix missing unlock on error in special_clk_ctl_put() https://lkml.org/lkml/2014/7/20/12 Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/bebob/bebob_maudio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'sound') diff --git a/sound/firewire/bebob/bebob_maudio.c b/sound/firewire/bebob/bebob_maudio.c index 6af50eb80ea7..fc470c60e433 100644 --- a/sound/firewire/bebob/bebob_maudio.c +++ b/sound/firewire/bebob/bebob_maudio.c @@ -379,12 +379,12 @@ static int special_clk_ctl_put(struct snd_kcontrol *kctl, struct special_params *params = bebob->maudio_special_quirk; int err, id; - mutex_lock(&bebob->mutex); - id = uval->value.enumerated.item[0]; if (id >= ARRAY_SIZE(special_clk_labels)) return 0; + mutex_lock(&bebob->mutex); + err = avc_maudio_set_special_clk(bebob, id, params->dig_in_fmt, params->dig_out_fmt, -- cgit v1.2.3 From 5a0438f4a6328b47bd3c00b2f03eb766cc72a75c Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Tue, 22 Jul 2014 23:13:47 +0900 Subject: ALSA: bebob: Use different labels for digital input/output This commit uses different labels for control elements of digital input/output interfaces to correct my misunderstanding about M-Audio Firewire 1814 and ProjectMix I/O. According to user manuals for these two models, they have two modes for digital input; one is S/PDIF in both of optical and coaxial interfaces, another is ADAT in optical interface only. But in current implementation, a control element for it reduced labels which a control element for digital output uses because of my misunderstanding that optical interface is not available for digital input with S/PDIF mode. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/bebob/bebob_maudio.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) (limited to 'sound') diff --git a/sound/firewire/bebob/bebob_maudio.c b/sound/firewire/bebob/bebob_maudio.c index fc470c60e433..42e6f22156f0 100644 --- a/sound/firewire/bebob/bebob_maudio.c +++ b/sound/firewire/bebob/bebob_maudio.c @@ -434,8 +434,8 @@ static struct snd_kcontrol_new special_sync_ctl = { .get = special_sync_ctl_get, }; -/* Digital interface control for special firmware */ -static char *const special_dig_iface_labels[] = { +/* Digital input interface control for special firmware */ +static char *const special_dig_in_iface_labels[] = { "S/PDIF Optical", "S/PDIF Coaxial", "ADAT Optical" }; static int special_dig_in_iface_ctl_info(struct snd_kcontrol *kctl, @@ -443,13 +443,13 @@ static int special_dig_in_iface_ctl_info(struct snd_kcontrol *kctl, { einf->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; einf->count = 1; - einf->value.enumerated.items = ARRAY_SIZE(special_dig_iface_labels); + einf->value.enumerated.items = ARRAY_SIZE(special_dig_in_iface_labels); if (einf->value.enumerated.item >= einf->value.enumerated.items) einf->value.enumerated.item = einf->value.enumerated.items - 1; strcpy(einf->value.enumerated.name, - special_dig_iface_labels[einf->value.enumerated.item]); + special_dig_in_iface_labels[einf->value.enumerated.item]); return 0; } @@ -504,9 +504,14 @@ static int special_dig_in_iface_ctl_set(struct snd_kcontrol *kctl, dig_in_fmt, params->dig_out_fmt, params->clk_lock); - if ((err < 0) || (params->dig_in_fmt > 0)) /* ADAT */ + if (err < 0) + goto end; + + /* For ADAT, optical interface is only available. */ + if (params->dig_in_fmt > 0) goto end; + /* For S/PDIF, optical/coaxial interfaces are selectable. */ err = avc_audio_set_selector(bebob->unit, 0x00, 0x04, dig_in_iface); if (err < 0) dev_err(&bebob->unit->device, @@ -525,18 +530,22 @@ static struct snd_kcontrol_new special_dig_in_iface_ctl = { .put = special_dig_in_iface_ctl_set }; +/* Digital output interface control for special firmware */ +static char *const special_dig_out_iface_labels[] = { + "S/PDIF Optical and Coaxial", "ADAT Optical" +}; static int special_dig_out_iface_ctl_info(struct snd_kcontrol *kctl, struct snd_ctl_elem_info *einf) { einf->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; einf->count = 1; - einf->value.enumerated.items = ARRAY_SIZE(special_dig_iface_labels) - 1; + einf->value.enumerated.items = ARRAY_SIZE(special_dig_out_iface_labels); if (einf->value.enumerated.item >= einf->value.enumerated.items) einf->value.enumerated.item = einf->value.enumerated.items - 1; strcpy(einf->value.enumerated.name, - special_dig_iface_labels[einf->value.enumerated.item + 1]); + special_dig_out_iface_labels[einf->value.enumerated.item]); return 0; } -- cgit v1.2.3 From f77ac91e8edade4755f732d52fa094dc3bfd8b8e Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Tue, 22 Jul 2014 23:13:56 +0900 Subject: ALSA: bebob: Correction for return value of .put callback This commit is for correction of my misunderstanding about return value of .put callback in ALSA Control interface. According to 'Writing ALSA Driver' (*1), return value of the callback has three patterns; 1: changed, 0: not changed, an negative value: fatal error. But I misunderstood that it's boolean; zero or nonzero. *1: Writing an ALSA Driver (2005, Takashi Iwai) http://www.alsa-project.org/main/index.php/ALSA_Driver_Documentation Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/bebob/bebob_maudio.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) (limited to 'sound') diff --git a/sound/firewire/bebob/bebob_maudio.c b/sound/firewire/bebob/bebob_maudio.c index 42e6f22156f0..d6d6ff8cb8dd 100644 --- a/sound/firewire/bebob/bebob_maudio.c +++ b/sound/firewire/bebob/bebob_maudio.c @@ -391,7 +391,10 @@ static int special_clk_ctl_put(struct snd_kcontrol *kctl, params->clk_lock); mutex_unlock(&bebob->mutex); - return err >= 0; + if (err >= 0) + err = 1; + + return err; } static struct snd_kcontrol_new special_clk_ctl = { .name = "Clock Source", @@ -491,14 +494,16 @@ static int special_dig_in_iface_ctl_set(struct snd_kcontrol *kctl, unsigned int id, dig_in_fmt, dig_in_iface; int err; - mutex_lock(&bebob->mutex); - id = uval->value.enumerated.item[0]; + if (id >= ARRAY_SIZE(special_dig_in_iface_labels)) + return -EINVAL; /* decode user value */ dig_in_fmt = (id >> 1) & 0x01; dig_in_iface = id & 0x01; + mutex_lock(&bebob->mutex); + err = avc_maudio_set_special_clk(bebob, params->clk_src, dig_in_fmt, @@ -508,14 +513,17 @@ static int special_dig_in_iface_ctl_set(struct snd_kcontrol *kctl, goto end; /* For ADAT, optical interface is only available. */ - if (params->dig_in_fmt > 0) + if (params->dig_in_fmt > 0) { + err = 1; goto end; + } /* For S/PDIF, optical/coaxial interfaces are selectable. */ err = avc_audio_set_selector(bebob->unit, 0x00, 0x04, dig_in_iface); if (err < 0) dev_err(&bebob->unit->device, "fail to set digital input interface: %d\n", err); + err = 1; end: special_stream_formation_set(bebob); mutex_unlock(&bebob->mutex); @@ -567,16 +575,20 @@ static int special_dig_out_iface_ctl_set(struct snd_kcontrol *kctl, unsigned int id; int err; - mutex_lock(&bebob->mutex); - id = uval->value.enumerated.item[0]; + if (id >= ARRAY_SIZE(special_dig_out_iface_labels)) + return -EINVAL; + + mutex_lock(&bebob->mutex); err = avc_maudio_set_special_clk(bebob, params->clk_src, params->dig_in_fmt, id, params->clk_lock); - if (err >= 0) + if (err >= 0) { special_stream_formation_set(bebob); + err = 1; + } mutex_unlock(&bebob->mutex); return err; -- cgit v1.2.3 From eb12f72ee7245ca207818b9efd10be2641494502 Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Wed, 23 Jul 2014 00:02:08 +0900 Subject: ALSA: bebob: Correction for return value of special_clk_ctl_put() in error This commit is a supplement to my previous patch. http://mailman.alsa-project.org/pipermail/alsa-devel/2014-July/079190.html The special_clk_ctl_put() still returns 0 in error handling case. It should return -EINVAL. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/bebob/bebob_maudio.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sound') diff --git a/sound/firewire/bebob/bebob_maudio.c b/sound/firewire/bebob/bebob_maudio.c index d6d6ff8cb8dd..70faa3a32526 100644 --- a/sound/firewire/bebob/bebob_maudio.c +++ b/sound/firewire/bebob/bebob_maudio.c @@ -381,7 +381,7 @@ static int special_clk_ctl_put(struct snd_kcontrol *kctl, id = uval->value.enumerated.item[0]; if (id >= ARRAY_SIZE(special_clk_labels)) - return 0; + return -EINVAL; mutex_lock(&bebob->mutex); -- cgit v1.2.3