dmatest: fix automatic buffer unmap type

The dmatest code relies on the DMAEngine API to automatically call
dma_unmap_single() on src buffers. The flags it passes are incorrect,
fix them.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 5589358..7e1b0aa 100644 (file)
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -285,7 +285,12 @@ static int dmatest_func(void *data)
 
        set_user_nice(current, 10);
 
-       flags = DMA_CTRL_ACK | DMA_COMPL_SKIP_DEST_UNMAP | DMA_PREP_INTERRUPT;
+       /*
+        * src buffers are freed by the DMAEngine code with dma_unmap_single()
+        * dst buffers are freed by ourselves below
+        */
+       flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT
+             | DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SRC_UNMAP_SINGLE;
 
        while (!kthread_should_stop()
               && !(iterations && total_tests >= iterations)) {