atmel-mci: convert to dma_request_channel and down-level dma_slave

dma_request_channel provides an exclusive channel, so we no longer need to
pass slave data through dmaengine.

Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 0 insertions, 8 deletions

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 7a0594f24a3f..90aca505a1df 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -234,10 +234,6 @@ static void dma_client_chan_alloc(struct dma_client *client)
         list_for_each_entry(device, &dma_device_list, global_node) {
                 if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
                         continue;
-                /* Does the client require a specific DMA controller? */
-                if (client->slave && client->slave->dma_dev
-                                && client->slave->dma_dev != device->dev)
-                        continue;
                 if (!dma_device_satisfies_mask(device, client->cap_mask))
                         continue;
 
@@ -613,10 +609,6 @@ void dma_async_client_register(struct dma_client *client)
         struct dma_chan *chan;
         int err;
 
-        /* validate client data */
-        BUG_ON(dma_has_cap(DMA_SLAVE, client->cap_mask) &&
-                !client->slave);
-
         mutex_lock(&dma_list_mutex);
         dmaengine_ref_count++;