dmaengine: ep93xx_dma: convert callback to helper function

This is in preperation of moving to a callback that provides results to the
callback for the transaction. The conversion will maintain current behavior
and the driver must convert to new callback mechanism at a later time in
order to receive results.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 4 insertions, 6 deletions

diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c
index 21f08cc3352b..aba0b381cb8c 100644
--- a/drivers/dma/ep93xx_dma.c
+++ b/drivers/dma/ep93xx_dma.c
@@ -739,10 +739,10 @@ static void ep93xx_dma_tasklet(unsigned long data)
 {
         struct ep93xx_dma_chan *edmac = (struct ep93xx_dma_chan *)data;
         struct ep93xx_dma_desc *desc, *d;
-        dma_async_tx_callback callback = NULL;
-        void *callback_param = NULL;
+        struct dmaengine_desc_callback cb;
         LIST_HEAD(list);
 
+        memset(&cb, 0, sizeof(cb));
         spin_lock_irq(&edmac->lock);
         /*
          * If dma_terminate_all() was called before we get to run, the active
@@ -757,8 +757,7 @@ static void ep93xx_dma_tasklet(unsigned long data)
                                 dma_cookie_complete(&desc->txd);
                         list_splice_init(&edmac->active, &list);
                 }
-                callback = desc->txd.callback;
-                callback_param = desc->txd.callback_param;
+                dmaengine_desc_get_callback(&desc->txd, &cb);
         }
         spin_unlock_irq(&edmac->lock);
 
@@ -771,8 +770,7 @@ static void ep93xx_dma_tasklet(unsigned long data)
                 ep93xx_dma_desc_put(edmac, desc);
         }
 
-        if (callback)
-                callback(callback_param);
+        dmaengine_desc_callback_invoke(&cb, NULL);
 }
 
 static irqreturn_t ep93xx_dma_interrupt(int irq, void *dev_id)