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@xxxxxxxxx>
Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
include/linux/dmaengine.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index a2b7c20..07fc9bb 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -897,6 +897,8 @@ static inline int dmaengine_terminate_async(struct dma_chan *chan)
*/
static inline void dmaengine_synchronize(struct dma_chan *chan)
{
+ might_sleep();
+
if (chan->device->device_synchronize)
chan->device->device_synchronize(chan);
}
--
2.1.4
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