dmaengine: pl08x: drop the useless function

Unneeded variable: "retval". Return "NULL" , so we have to make code clear.
better way, drop the function.

Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Link: https://lore.kernel.org/r/1649726180-13133-1-git-send-email-baihaowen@meizu.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index a24882b..a4a794e 100644 (file)
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -1535,14 +1535,6 @@ static void pl08x_free_chan_resources(struct dma_chan *chan)
        vchan_free_chan_resources(to_virt_chan(chan));
 }
 
-static struct dma_async_tx_descriptor *pl08x_prep_dma_interrupt(
-               struct dma_chan *chan, unsigned long flags)
-{
-       struct dma_async_tx_descriptor *retval = NULL;
-
-       return retval;
-}
-
 /*
  * Code accessing dma_async_is_complete() in a tight loop may give problems.
  * If slaves are relying on interrupts to signal completion this function
@@ -2760,7 +2752,6 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
        pl08x->memcpy.dev = &adev->dev;
        pl08x->memcpy.device_free_chan_resources = pl08x_free_chan_resources;
        pl08x->memcpy.device_prep_dma_memcpy = pl08x_prep_dma_memcpy;
-       pl08x->memcpy.device_prep_dma_interrupt = pl08x_prep_dma_interrupt;
        pl08x->memcpy.device_tx_status = pl08x_dma_tx_status;
        pl08x->memcpy.device_issue_pending = pl08x_issue_pending;
        pl08x->memcpy.device_config = pl08x_config;
@@ -2787,8 +2778,6 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
                pl08x->slave.dev = &adev->dev;
                pl08x->slave.device_free_chan_resources =
                        pl08x_free_chan_resources;
-               pl08x->slave.device_prep_dma_interrupt =
-                       pl08x_prep_dma_interrupt;
                pl08x->slave.device_tx_status = pl08x_dma_tx_status;
                pl08x->slave.device_issue_pending = pl08x_issue_pending;
                pl08x->slave.device_prep_slave_sg = pl08x_prep_slave_sg;