dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic

Add context parameter to device_prep_slave_sg() and device_prep_dma_cyclic()
interfaces to allow passing client/target specific information associated
with the data transfer.
Modify all affected DMA engine drivers.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index c93bb0459972..65c0495a6d40 100644
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -587,7 +587,8 @@ static void pd_issue_pending(struct dma_chan *chan)
 
 static struct dma_async_tx_descriptor *pd_prep_slave_sg(struct dma_chan *chan,
                         struct scatterlist *sgl, unsigned int sg_len,
-                        enum dma_transfer_direction direction, unsigned long flags)
+                        enum dma_transfer_direction direction, unsigned long flags,
+                        void *context)
 {
         struct pch_dma_chan *pd_chan = to_pd_chan(chan);
         struct pch_dma_slave *pd_slave = chan->private;