async_tx: kill ASYNC_TX_ASSUME_COHERENT

Remove the unused ASYNC_TX_ASSUME_COHERENT flag.  Async_tx is
meant to hide the difference between asynchronous hardware and synchronous
software operations, this flag requires clients to understand cache
coherency consequences of the async path.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

1 files changed, 5 insertions, 10 deletions

diff --git a/crypto/async_tx/async_memcpy.c b/crypto/async_tx/async_memcpy.c
index 047e533fcc5b..e8c8956ef1dd 100644
--- a/crypto/async_tx/async_memcpy.c
+++ b/crypto/async_tx/async_memcpy.c
@@ -35,7 +35,7 @@
  * @src: src page
  * @offset: offset in pages to start transaction
  * @len: length in bytes
- * @flags: ASYNC_TX_ASSUME_COHERENT, ASYNC_TX_ACK, ASYNC_TX_DEP_ACK,
+ * @flags: ASYNC_TX_ACK, ASYNC_TX_DEP_ACK,
  * @depend_tx: memcpy depends on the result of this transaction
  * @cb_fn: function to call when the memcpy completes
  * @cb_param: parameter to pass to the callback routine
@@ -55,20 +55,15 @@ async_memcpy(struct page *dest, struct page *src, unsigned int dest_offset,
 
         if (tx) { /* run the memcpy asynchronously */
                 dma_addr_t addr;
-                enum dma_data_direction dir;
 
                 pr_debug("%s: (async) len: %zu\n", __FUNCTION__, len);
 
-                dir = (flags & ASYNC_TX_ASSUME_COHERENT) ?
-                        DMA_NONE : DMA_FROM_DEVICE;
-
-                addr = dma_map_page(device->dev, dest, dest_offset, len, dir);
+                addr = dma_map_page(device->dev, dest, dest_offset, len,
+                                    DMA_FROM_DEVICE);
                 tx->tx_set_dest(addr, tx, 0);
 
-                dir = (flags & ASYNC_TX_ASSUME_COHERENT) ?
-                        DMA_NONE : DMA_TO_DEVICE;
-
-                addr = dma_map_page(device->dev, src, src_offset, len, dir);
+                addr = dma_map_page(device->dev, src, src_offset, len,
+                                    DMA_TO_DEVICE);
                 tx->tx_set_src(addr, tx, 0);
 
                 async_tx_submit(chan, tx, flags, depend_tx, cb_fn, cb_param);