From: Qais Yousef <qais.yousef@imgtec.com>
Date: Wed, 14 Jan 2015 08:47:29 +0000 (+0000)
Subject: ASoC: soc-compress.c: fix NULL dereference
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~214^2~1^2~1^3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3268a40d4b19ff7bee23f52eabbc4e96bb685e8;p=pandora-kernel.git

ASoC: soc-compress.c: fix NULL dereference

In soc_new_compress() when rtd->dai_link->dynamic is set, we create the pcm
substreams with this call:

   ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
                                   1, 0, &be_pcm);

which passes 0 as capture_count leading to

   be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream

being NULL, hence when trying to set rtd a few lines below we get an oops.

Fix by using rtd->dai_link->dpcm_playback and rtd->dai_link->dpcm_capture as
playback_count and capture_count to snd_pcm_new_internal().

Signed-off-by: Qais Yousef <qais.yousef@imgtec.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
---

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