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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2014-07-22 23:13:56 +0900
committerTakashi Iwai <tiwai@suse.de>2014-07-22 16:21:54 +0200
commitf77ac91e8edade4755f732d52fa094dc3bfd8b8e (patch)
tree8ba708e922f0dc20e0dfb52bcff26b501c8b7840 /sound/firewire
parent5a0438f4a6328b47bd3c00b2f03eb766cc72a75c (diff)
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 <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire')
-rw-r--r--sound/firewire/bebob/bebob_maudio.c26
1 files changed, 19 insertions, 7 deletions
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;