Documentation: dmaengine: clarify dma_slave_config expectations
dma_slave_config is expected to be set for slave operations Only, not for
memcpy ones
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/Documentation/dmaengine/provider.txt b/Documentation/dmaengine/provider.txt
index 2c391cf..05d2280 100644
--- a/Documentation/dmaengine/provider.txt
+++ b/Documentation/dmaengine/provider.txt
@@ -310,6 +310,10 @@
- Even though that structure contains a direction field, this
field is deprecated in favor of the direction argument given to
the prep_* functions
+ - This call is mandatory for slave operations only. This should NOT be
+ set or expected to be set for memcpy operations.
+ If a driver support both, it should use this call for slave
+ operations only and not for memcpy ones.
* device_pause
- Pauses a transfer on the channel