Adding dmaengine core helper function in order to prep for error
reporting.
Signed-off-by: Dave Jiang <dave.jiang@xxxxxxxxx>
---
include/linux/dmaengine.h | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 30de019..95cf217 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -1372,6 +1372,27 @@ static inline int dmaengine_desc_free(struct dma_async_tx_descriptor *desc)
return -EPERM;
}
+struct dmaengine_desc_callback {
+ dma_async_tx_callback callback;
+ void *callback_param;
+};
+
+static inline void
+dmaengine_desc_get_callback(struct dma_async_tx_descriptor *tx,
+ struct dmaengine_desc_callback *cb)
+{
+ cb->callback = tx->callback;
+ cb->callback_param = tx->callback_param;
+}
+
+static inline void
+dmaengine_desc_callback_invoke(struct dmaengine_desc_callback *cb,
+ void *result)
+{
+ if (cb->callback)
+ cb->callback(cb->callback_param);
+}
+
/* --- DMA device --- */
int dma_async_device_register(struct dma_device *device);
--
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