dmaengine: Add dma_client parameter to device_alloc_chan_resources

A DMA controller capable of doing slave transfers may need to know a
few things about the slave when preparing the channel. We don't want
to add this information to struct dma_channel since the channel hasn't
yet been bound to a client at this point.

Instead, pass a reference to the client requesting the channel to the
driver's device_alloc_chan_resources hook so that it can pick the
necessary information from the dma_client struct by itself.

[dan.j.williams@intel.com: fixed up fsldma and mv_xor]
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 724f6fdd0af6..c0059ca58340 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -366,7 +366,8 @@ static struct fsl_desc_sw *fsl_dma_alloc_descriptor(
  *
  * Return - The number of descriptors allocated.
  */
-static int fsl_dma_alloc_chan_resources(struct dma_chan *chan)
+static int fsl_dma_alloc_chan_resources(struct dma_chan *chan,
+                                        struct dma_client *client)
 {
         struct fsl_dma_chan *fsl_chan = to_fsl_chan(chan);
         LIST_HEAD(tmp_list);
@@ -819,7 +820,7 @@ static int fsl_dma_self_test(struct fsl_dma_chan *fsl_chan)
 
         chan = &fsl_chan->common;
 
-        if (fsl_dma_alloc_chan_resources(chan) < 1) {
+        if (fsl_dma_alloc_chan_resources(chan, NULL) < 1) {
                 dev_err(fsl_chan->dev,
                                 "selftest: Cannot alloc resources for DMA\n");
                 err = -ENODEV;
@@ -847,7 +848,7 @@ static int fsl_dma_self_test(struct fsl_dma_chan *fsl_chan)
         /* Test free and re-alloc channel resources */
         fsl_dma_free_chan_resources(chan);
 
-        if (fsl_dma_alloc_chan_resources(chan) < 1) {
+        if (fsl_dma_alloc_chan_resources(chan, NULL) < 1) {
                 dev_err(fsl_chan->dev,
                                 "selftest: Cannot alloc resources for DMA\n");
                 err = -ENODEV;