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usb: renesas_usbhs: use dmaengine helper functions

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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>
This commit is contained in:
Kuninori Morimoto 2012-07-08 23:10:28 -07:00 committed by Greg Kroah-Hartman
parent 277bd8746b
commit 2f0de9d844
1 changed files with 3 additions and 11 deletions
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14
drivers/usb/renesas_usbhs/fifo.c
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@ -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;
}