From bfc5c26fb692fa7a196108c3b23d9c747d105c00 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 4 Nov 2008 17:48:39 +0100
Subject: ALSA: hda - Don't create empty PCM streams

Due to the hda-reconfiguration patches, the check of empty stream
is gone, and this results in an error with the codec setup with empty
streams.

This patch adds the check again to avoid the error at probing.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index aa9cd14..3e7cda9 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -2485,6 +2485,11 @@ int snd_hda_build_pcms(struct hda_bus *bus)
 			struct hda_pcm *cpcm = &codec->pcm_info[pcm];
 			int type = cpcm->pcm_type;
 			int dev;
+
+			if (!cpcm->stream[0].substreams &&
+			    !cpcm->stream[1].substreams)
+				continue; /* no substreams assigned */
+
 			switch (type) {
 			case HDA_PCM_TYPE_AUDIO:
 				if (num_devs[type] >= ARRAY_SIZE(audio_idx)) {
-- 
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