tree 3bcedb97c64864b3811699cb1ea865ef95e76c3e
parent efd6947945fe5ebcf759e762f51c4e1d867edc49
author Vasily Khoruzhick <anarsoul@gmail.com> 1301730887 +0300
committer Mark Brown <broonie@opensource.wolfsonmicro.com> 1301824136 +0900

ASoC: PXA: Fix oops in __pxa2xx_pcm_prepare

pxa2xx_pcm_hw_free frees dma channel and sets prtd->dma_ch to -1,
but does not set prtd->params to NULL, so if pxa2xx_pcm_hw_params will
be called immediately, it leaves prtd->dma_ch initialized with -1,
and it results in oops in __pxa2xx_pcm_prepare. This bug is triggered
via SDL.

This patch adds check for prtd->dma_ch to __pxa2xx_pcm_prepare and
cleans prtd->params, so now it works properly.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>