dma: imx-sdma: make channel0 operations atomic

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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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Richard Zhao 2012-05-11 15:14:27 +08:00 • committed by Vinod Koul

parent 922ee08baa

commit 2ccaef0520

1 changed files with 31 additions and 26 deletions

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drivers/dma/imx-sdma.c

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