From: Richard Zhao <richard.zhao@freescale.com>
Date: Fri, 11 May 2012 07:14:27 +0000 (+0800)
Subject: dma: imx-sdma: make channel0 operations atomic
X-Git-Tag: v3.5-rc1~80^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ccaef0520d18d0072153f090d4110b4075c332c;p=pandora-kernel.git

dma: imx-sdma: make channel0 operations atomic

device_prep_dma_cyclic may be call in audio trigger function which is
atomic context, so we make it atomic too.

 - change channel0 lock to spinlock.
 - Use polling to wait for channel0 finish running.

Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
---

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