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dmaengine: Add might_sleep() to dmaengine_synchronize()

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Implementations of dmaengine_synchronize() are allowed to sleep, hence the
function must not be called to from atomic context. Add might_sleep() to
dmaengine_synchronize() to make it easier to detect non-compliant callers.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Lars-Peter Clausen
2015-11-23 11:06:43 +01:00
committed by Vinod Koul
parent bc0e734516
commit b1d6ab1aa8
1 changed files with 2 additions and 0 deletions
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include/linux/dmaengine.h
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@@ -895,6 +895,8 @@ static inline int dmaengine_terminate_async(struct dma_chan *chan)
*/ */
static inline void dmaengine_synchronize(struct dma_chan *chan) static inline void dmaengine_synchronize(struct dma_chan *chan)
{ {
might_sleep();
if (chan->device->device_synchronize) if (chan->device->device_synchronize)
chan->device->device_synchronize(chan); chan->device->device_synchronize(chan);
} }