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[ALSA] Check value range in ctl callbacks

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Check the value ranges in ctl put callbacks properly (in the rest drivers).

Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Jaroslav Kysela <[email protected]>
This commit is contained in:
Takashi Iwai 2007-11-15 16:17:24 +01:00 • committed by Jaroslav Kysela
commit 3b89246778
6 changed files with 36 additions and 8 deletions
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7
sound/sh/aica.c
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@ -523,11 +523,14 @@ static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_card_aica *dreamcastcard;
unsigned int vol;
dreamcastcard = kcontrol->private_data;
if (unlikely(!dreamcastcard->channel))
return -ETXTBSY;
if (unlikely(dreamcastcard->channel->vol ==
ucontrol->value.integer.value[0]))
vol = ucontrol->value.integer.value[0];
if (vol > 0xff)
return -EINVAL;
if (unlikely(dreamcastcard->channel->vol == vol))
return 0;
dreamcastcard->channel->vol = ucontrol->value.integer.value[0];
dreamcastcard->master_volume = ucontrol->value.integer.value[0];