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ALSA: vmaster: Return error for invalid input values

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So far the vmaster code has been tolerant about the input values and
accepts any values by correcting internally.  But now our own selftest
starts complaining about this behavior, so let's be picky and change
the behavior to return -EINVAL for invalid input values instead.

Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Closes: https://lore.kernel.org/r/1d44be36-9bb9-4d82-8953-5ae2a4f09405@molgen.mpg.de
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/20240616073454.16512-2-tiwai@suse.de
This commit is contained in:
Takashi Iwai 2024-06-16 09:34:42 +02:00
parent eb882afcfa
commit 10457f5042
1 changed files with 8 additions and 0 deletions
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8
sound/core/vmaster.c
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@ -198,6 +198,12 @@ static int follower_put(struct snd_kcontrol *kcontrol,
err = follower_init(follower);
if (err < 0)
return err;
for (ch = 0; ch < follower->info.count; ch++) {
if (ucontrol->value.integer.value[ch] < follower->info.min_val ||
ucontrol->value.integer.value[ch] > follower->info.max_val)
return -EINVAL;
}
for (ch = 0; ch < follower->info.count; ch++) {
if (follower->vals[ch] != ucontrol->value.integer.value[ch]) {
changed = 1;
@ -365,6 +371,8 @@ static int master_put(struct snd_kcontrol *kcontrol,
new_val = ucontrol->value.integer.value[0];
if (new_val == old_val)
return 0;
if (new_val < master->info.min_val || new_val > master->info.max_val)
return -EINVAL;
err = sync_followers(master, old_val, new_val);
if (err < 0)