From f8b7163529831ee3ad6a1aeaa0f1256cb527008d Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Thu, 12 Nov 2009 09:50:28 +0100 Subject: [PATCH] ALSA: hda - Don't access invalid substream in proc file The commit e3303235209c0496b490e10ab131e72a9568c153 "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 --- sound/pci/hda/hda_proc.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/sound/pci/hda/hda_proc.c b/sound/pci/hda/hda_proc.c index f5639c2..f5b783c 100644 --- a/sound/pci/hda/hda_proc.c +++ b/sound/pci/hda/hda_proc.c @@ -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); -- 2.7.4