[ALSA] hda-codec - Check value range in ctl callbacks
Check the value ranges in ctl put callbacks properly so that
invalid values won't be stored or written to registers.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index c4447b1..0817f42 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -349,12 +349,13 @@
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
struct sigmatel_spec *spec = codec->spec;
unsigned int dac_mode;
+ unsigned int val;
- if (spec->aloopback == ucontrol->value.integer.value[0])
+ val = !!ucontrol->value.integer.value[0];
+ if (spec->aloopback == val)
return 0;
- spec->aloopback = ucontrol->value.integer.value[0];
-
+ spec->aloopback = val;
dac_mode = snd_hda_codec_read(codec, codec->afg, 0,
kcontrol->private_value & 0xFFFF, 0x0);
@@ -373,6 +374,42 @@
return 1;
}
+static int stac92xx_volknob_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 127;
+ return 0;
+}
+
+static int stac92xx_volknob_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ ucontrol->value.integer.value[0] = kcontrol->private_value & 0xff;
+ return 0;
+}
+
+static int stac92xx_volknob_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
+ unsigned int oval = kcontrol->private_value & 0xff;
+ unsigned int val;
+
+ val = ucontrol->value.integer.value[0] & 0xff;
+ if (val == oval)
+ return 0;
+
+ kcontrol->private_value &= ~0xff;
+ kcontrol->private_value |= val;
+
+ snd_hda_codec_write_cache(codec, kcontrol->private_value >> 16, 0,
+ AC_VERB_SET_VOLUME_KNOB_CONTROL, val | 0x80);
+ return 1;
+}
+
static struct hda_verb stac9200_core_init[] = {
/* set dac0mux for dac converter */
{ 0x07, AC_VERB_SET_CONNECT_SEL, 0x00},
@@ -1588,7 +1625,7 @@
struct sigmatel_spec *spec = codec->spec;
hda_nid_t nid = kcontrol->private_value >> 8;
int io_idx = kcontrol-> private_value & 0xff;
- unsigned short val = ucontrol->value.integer.value[0];
+ unsigned short val = !!ucontrol->value.integer.value[0];
spec->io_switch[io_idx] = val;
@@ -1628,11 +1665,12 @@
struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
struct sigmatel_spec *spec = codec->spec;
hda_nid_t nid = kcontrol->private_value & 0xff;
+ unsigned int val = !!ucontrol->value.integer.value[0];
- if (spec->clfe_swap == ucontrol->value.integer.value[0])
+ if (spec->clfe_swap == val)
return 0;
- spec->clfe_swap = ucontrol->value.integer.value[0];
+ spec->clfe_swap = val;
snd_hda_codec_write_cache(codec, nid, 0, AC_VERB_SET_EAPD_BTLENABLE,
spec->clfe_swap ? 0x4 : 0x0);