ALSA: ice1724 - limit channels for multi-channel playback

Limit the available channels for multi-channel playback device to
the real number of channels.  Until now, always up to 8 channels
are created, which are simply useless without the real outputs.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 3 insertions, 2 deletions

diff --git a/sound/pci/ice1712/ice1724.c b/sound/pci/ice1712/ice1724.c
index 60119d220a66..7bb99df44fd1 100644
--- a/sound/pci/ice1712/ice1724.c
+++ b/sound/pci/ice1712/ice1724.c
@@ -942,7 +942,7 @@ static int snd_vt1724_playback_pro_open(struct snd_pcm_substream *substream)
 {
         struct snd_pcm_runtime *runtime = substream->runtime;
         struct snd_ice1712 *ice = snd_pcm_substream_chip(substream);
-        int chs;
+        int chs, num_indeps;
 
         runtime->private_data = (void *)&vt1724_playback_pro_reg;
         ice->playback_pro_substream = substream;
@@ -952,7 +952,8 @@ static int snd_vt1724_playback_pro_open(struct snd_pcm_substream *substream)
         set_rate_constraints(ice, substream);
         mutex_lock(&ice->open_mutex);
         /* calculate the currently available channels */
-        for (chs = 0; chs < 3; chs++) {
+        num_indeps = ice->num_total_dacs / 2 - 1;
+        for (chs = 0; chs < num_indeps; chs++) {
                 if (ice->pcm_reserved[chs])
                         break;
         }