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ALSA: hda - Don't access invalid substream in proc file 

The commit e330323520
"ALSA: hda - proc - show which I/O NID is associated to PCM device"
introduces the access to substream pointer.  But, PCMs may have no
substreams in one or both directions, and this results in NULL
dereference.  Also, print the first substream number doesn't make
sense.

This patch removes the access to the substream pointer, and reformat
to fit to the standard coding style.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-11-12 09:50:28 +01:00
parent a2f6309e83
commit f8b7163529
1 changed files with 5 additions and 5 deletions
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10
sound/pci/hda/hda_proc.c
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@ -316,11 +316,11 @@ static void print_audio_io(struct snd_info_buffer *buffer,
for (type = 0; type < 2; type++) {
if (cpcm->stream[type].nid != nid || cpcm->pcm == NULL)
continue;
snd_iprintf(buffer, " Device: name=\"%s\", type=\"%s\", device=%i, substream=%i\n",
cpcm->name,
snd_hda_pcm_type_name[cpcm->pcm_type],
cpcm->pcm->device,
cpcm->pcm->streams[type].substream->number);
snd_iprintf(buffer, " Device: name=\"%s\", "
"type=\"%s\", device=%i\n",
cpcm->name,
snd_hda_pcm_type_name[cpcm->pcm_type],
cpcm->pcm->device);
}
}
conv = snd_hda_codec_read(codec, nid, 0, AC_VERB_GET_CONV, 0);