Merge tag 'nfs-for-5.1-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

[sfrench/cifs-2.6.git] / Documentation / driver-api / dmaengine / client.rst

diff --git a/Documentation/driver-api/dmaengine/client.rst b/Documentation/driver-api/dmaengine/client.rst
index fbbb2831f29f8c7f50675238289478c98f472606..d728e50105eb3d82c09758ba6584cd65cba07f8a 100644 (file)
--- a/Documentation/driver-api/dmaengine/client.rst
+++ b/Documentation/driver-api/dmaengine/client.rst
@@ -168,6 +168,13 @@ The details of these operations are:
    dmaengine_submit() will not start the DMA operation, it merely adds
    it to the pending queue. For this, see step 5, dma_async_issue_pending.
 
+   .. note::
+
+      After calling ``dmaengine_submit()`` the submitted transfer descriptor
+      (``struct dma_async_tx_descriptor``) belongs to the DMA engine.
+      Consequentially, the client must consider invalid the pointer to that
+      descriptor.
+
 5. Issue pending DMA requests and wait for callback notification
 
    The transactions in the pending queue can be activated by calling the