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>

diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 6ec7f83..d5272d4 100644 (file)
--- 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;
        }