usb: renesas_usbhs: use dmaengine helper functions

This patch used dmaengine helper functions instead of using hand setting.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 11 deletions

diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 6ec7f838d7fa..d5272d4714ce 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -771,22 +771,15 @@ static void xfer_work(struct work_struct *work)
         struct usbhs_pipe *pipe = pkt->pipe;
         struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
-        struct scatterlist sg;
         struct dma_async_tx_descriptor *desc;
         struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
         struct device *dev = usbhs_priv_to_dev(priv);
         enum dma_transfer_direction dir;
-        dma_cookie_t cookie;
 
         dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV;
 
-        sg_init_table(&sg, 1);
-        sg_set_page(&sg, virt_to_page(pkt->dma),
-                    pkt->length, offset_in_page(pkt->dma));
-        sg_dma_address(&sg) = pkt->dma + pkt->actual;
-        sg_dma_len(&sg) = pkt->trans;
-
-        desc = dmaengine_prep_slave_sg(chan, &sg, 1, dir,
+        desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual,
+                                        pkt->trans, dir,
                                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
         if (!desc)
                 return;
@@ -794,8 +787,7 @@ static void xfer_work(struct work_struct *work)
         desc->callback          = usbhsf_dma_complete;
         desc->callback_param    = pipe;
 
-        cookie = desc->tx_submit(desc);
-        if (cookie < 0) {
+        if (dmaengine_submit(desc) < 0) {
                 dev_err(dev, "Failed to submit dma descriptor\n");
                 return;
         }