[PATCH 01/11] dma: imx-sdma: make channel0 operations atomic

[Lothar Waßmann]

Hi,

Richard Zhao writes:
> 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: Lothar Waßmann <LW at KARO-electronics.de>
>
Actually I didn't sign off the patch that I posted, because I wanted
to wait for more comments first.


Lothar Waßmann
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