From: Stephen Warren <swarren@nvidia.com>
Date: Thu, 4 Aug 2011 22:44:42 +0000 (-0600)
Subject: ASoC: Tegra: tegra_pcm_deallocate_dma_buffer: Don't OOPS
X-Git-Tag: v3.1-rc2~4^2^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a96edd59b2bc88b3d1ea47e0ba48076d65db9302;p=pandora-kernel.git

ASoC: Tegra: tegra_pcm_deallocate_dma_buffer: Don't OOPS

Not all PCM devices have all sub-streams. Specifically, the SPDIF driver
only supports playback and hence has no capture substream. Check whether
a substream exists before dereferencing it, when de-allocating DMA
buffers in tegra_pcm_deallocate_dma_buffer.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org
---

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