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ALSA: vmaster: Fix slave change notification

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commit 2069d483b3 upstream.

When a value of a vmaster slave control is changed, the ctl change
notification is sometimes ignored.  This happens when the master
control overrides, e.g. when the corresponding master control is
muted.  The reason is that slave_put() returns the value of the actual
slave put callback, and it doesn't reflect the virtual slave value
change.

This patch fixes the function just to return 1 whenever a slave value
is changed.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2013-03-05 15:43:39 +01:00 committed by Greg Kroah-Hartman
parent 1515f18665
commit f4ec9b23b1
1 changed files with 4 additions and 1 deletions
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5
sound/core/vmaster.c
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@ -213,7 +213,10 @@ static int slave_put(struct snd_kcontrol *kcontrol,
}
if (!changed)
return 0;
return slave_put_val(slave, ucontrol);
err = slave_put_val(slave, ucontrol);
if (err < 0)
return err;
return 1;
}
static int slave_tlv_cmd(struct snd_kcontrol *kcontrol,