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[ALSA] ak4xxx - Check value ranges in ctl callbacks 

Check the value ranges in ctl put callbacks properly in ak4xxx-adda driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Takashi Iwai 2007-11-15 16:15:29 +01:00 committed by Jaroslav Kysela
parent d4079ac49a
commit 02ff132493
1 changed files with 34 additions and 11 deletions
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45
sound/i2c/other/ak4xxx-adda.c
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@ -377,8 +377,11 @@ static int put_ak_reg(struct snd_kcontrol *kcontrol, int addr,
static int snd_akm4xxx_volume_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
return put_ak_reg(kcontrol, AK_GET_ADDR(kcontrol->private_value),
ucontrol->value.integer.value[0]);
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
unsigned int val = ucontrol->value.integer.value[0];
if (val > mask)
return -EINVAL;
return put_ak_reg(kcontrol, AK_GET_ADDR(kcontrol->private_value), val);
}
static int snd_akm4xxx_stereo_volume_info(struct snd_kcontrol *kcontrol,
@ -409,11 +412,16 @@ static int snd_akm4xxx_stereo_volume_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int addr = AK_GET_ADDR(kcontrol->private_value);
unsigned int mask = AK_GET_MASK(kcontrol->private_value);
unsigned int val[2];
int change;
change = put_ak_reg(kcontrol, addr, ucontrol->value.integer.value[0]);
change |= put_ak_reg(kcontrol, addr + 1,
ucontrol->value.integer.value[1]);
val[0] = ucontrol->value.integer.value[0];
val[1] = ucontrol->value.integer.value[1];
if (val[0] > mask || val[1] > mask)
return -EINVAL;
change = put_ak_reg(kcontrol, addr, val[0]);
change |= put_ak_reg(kcontrol, addr + 1, val[1]);
return change;
}
@ -508,6 +516,18 @@ static int ak4xxx_switch_put(struct snd_kcontrol *kcontrol,
#define AK5365_NUM_INPUTS 5
static int ak4xxx_capture_num_inputs(struct snd_akm4xxx *ak, int mixer_ch)
{
int num_names;
const char **input_names;
input_names = ak->adc_info[mixer_ch].input_names;
num_names = 0;
while (num_names < AK5365_NUM_INPUTS && input_names[num_names])
++num_names;
return num_names;
}
static int ak4xxx_capture_source_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo)
{
@ -516,18 +536,16 @@ static int ak4xxx_capture_source_info(struct snd_kcontrol *kcontrol,
const char **input_names;
int num_names, idx;
input_names = ak->adc_info[mixer_ch].input_names;
num_names = 0;
while (num_names < AK5365_NUM_INPUTS && input_names[num_names])
++num_names;
num_names = ak4xxx_capture_num_inputs(ak, mixer_ch);
if (!num_names)
return -EINVAL;
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = 1;
uinfo->value.enumerated.items = num_names;
idx = uinfo->value.enumerated.item;
if (idx >= num_names)
return -EINVAL;
input_names = ak->adc_info[mixer_ch].input_names;
strncpy(uinfo->value.enumerated.name, input_names[idx],
sizeof(uinfo->value.enumerated.name));
return 0;
@ -551,10 +569,15 @@ static int ak4xxx_capture_source_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_akm4xxx *ak = snd_kcontrol_chip(kcontrol);
int mixer_ch = AK_GET_SHIFT(kcontrol->private_value);
int chip = AK_GET_CHIP(kcontrol->private_value);
int addr = AK_GET_ADDR(kcontrol->private_value);
int mask = AK_GET_MASK(kcontrol->private_value);
unsigned char oval, val;
int num_names = ak4xxx_capture_num_inputs(ak, mixer_ch);
if (ucontrol->value.enumerated.item[0] >= num_names)
return -EINVAL;
oval = snd_akm4xxx_get(ak, chip, addr);
val = oval & ~mask;