[PATCH 1/2 V2] dmaengine/dma_slave: introduce inline wrappers

From: Alexandre Bounine
Date: Thu Mar 08 2012 - 16:16:34 EST

Add inline wrappers for device_prep_slave_sg() and device_prep_dma_cyclic()
interfaces to hide new parameter from current users of affected interfaces.
Convert current users to use new wrappers instead of direct calls.
Suggested by Russell King [https://lkml.org/lkml/2012/2/3/269].

Signed-off-by: Alexandre Bounine <alexandre.bounine@xxxxxxx>
---
arch/arm/plat-nomadik/include/plat/ste_dma40.h | 3 +-
arch/arm/plat-samsung/dma-ops.c | 4 +-
drivers/media/video/mx3_camera.c | 2 +-
drivers/media/video/timblogiw.c | 2 +-
drivers/mmc/host/atmel-mci.c | 2 +-
drivers/mmc/host/mmci.c | 2 +-
drivers/mmc/host/mxcmmc.c | 2 +-
drivers/mmc/host/mxs-mmc.c | 2 +-
drivers/mmc/host/sh_mmcif.c | 4 +-
drivers/mmc/host/tmio_mmc_dma.c | 4 +-
drivers/mtd/nand/gpmi-nand/gpmi-lib.c | 25 ++++++++++-------------
drivers/net/ethernet/micrel/ks8842.c | 4 +-
drivers/spi/spi-dw-mid.c | 4 +-
drivers/spi/spi-ep93xx.c | 4 +-
drivers/spi/spi-pl022.c | 4 +-
drivers/spi/spi-topcliff-pch.c | 4 +-
drivers/tty/serial/amba-pl011.c | 6 +---
drivers/tty/serial/pch_uart.c | 4 +-
drivers/tty/serial/sh-sci.c | 4 +-
drivers/usb/musb/ux500_dma.c | 3 +-
drivers/usb/renesas_usbhs/fifo.c | 5 +--
drivers/video/mx3fb.c | 4 +-
include/linux/dmaengine.h | 16 +++++++++++++++
sound/soc/ep93xx/ep93xx-pcm.c | 3 +-
sound/soc/imx/imx-pcm-dma-mx2.c | 2 +-
sound/soc/mxs/mxs-pcm.c | 2 +-
sound/soc/sh/siu_pcm.c | 4 +-
sound/soc/txx9/txx9aclc.c | 2 +-
28 files changed, 67 insertions(+), 60 deletions(-)

diff --git a/arch/arm/plat-nomadik/include/plat/ste_dma40.h b/arch/arm/plat-nomadik/include/plat/ste_dma40.h
index fd0ee84..9ff93b0 100644
--- a/arch/arm/plat-nomadik/include/plat/ste_dma40.h
+++ b/arch/arm/plat-nomadik/include/plat/ste_dma40.h
@@ -200,8 +200,7 @@ dma_async_tx_descriptor *stedma40_slave_mem(struct dma_chan *chan,
sg.dma_address = addr;
sg.length = size;

- return chan->device->device_prep_slave_sg(chan, &sg, 1,
- direction, flags);
+ return dmaengine_prep_slave_sg(chan, &sg, 1, direction, flags);
}

#else
diff --git a/arch/arm/plat-samsung/dma-ops.c b/arch/arm/plat-samsung/dma-ops.c
index 0747c77..a6ef396 100644
--- a/arch/arm/plat-samsung/dma-ops.c
+++ b/arch/arm/plat-samsung/dma-ops.c
@@ -79,11 +79,11 @@ static int samsung_dmadev_prepare(unsigned ch,
info->len, offset_in_page(info->buf));
sg_dma_address(&sg) = info->buf;

- desc = chan->device->device_prep_slave_sg(chan,
+ desc = dmaengine_prep_slave_sg(chan,
&sg, 1, info->direction, DMA_PREP_INTERRUPT);
break;
case DMA_CYCLIC:
- desc = chan->device->device_prep_dma_cyclic(chan,
+ desc = dmaengine_prep_dma_cyclic(chan,
info->buf, info->len, info->period, info->direction);
break;
default:
diff --git a/drivers/media/video/mx3_camera.c b/drivers/media/video/mx3_camera.c
index 7452277..93c35ef 100644
--- a/drivers/media/video/mx3_camera.c
+++ b/drivers/media/video/mx3_camera.c
@@ -286,7 +286,7 @@ static void mx3_videobuf_queue(struct vb2_buffer *vb)
sg_dma_address(sg) = vb2_dma_contig_plane_dma_addr(vb, 0);
sg_dma_len(sg) = new_size;

- txd = ichan->dma_chan.device->device_prep_slave_sg(
+ txd = dmaengine_prep_slave_sg(
&ichan->dma_chan, sg, 1, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT);
if (!txd)
diff --git a/drivers/media/video/timblogiw.c b/drivers/media/video/timblogiw.c
index 4ed1c7c2..02194c0 100644
--- a/drivers/media/video/timblogiw.c
+++ b/drivers/media/video/timblogiw.c
@@ -564,7 +564,7 @@ static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)

spin_unlock_irq(&fh->queue_lock);

- desc = fh->chan->device->device_prep_slave_sg(fh->chan,
+ desc = dmaengine_prep_slave_sg(fh->chan,
buf->sg, sg_elems, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
if (!desc) {
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index e4449a5..f658348 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -872,7 +872,7 @@ atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data)
sglen = dma_map_sg(chan->device->dev, data->sg,
data->sg_len, direction);

- desc = chan->device->device_prep_slave_sg(chan,
+ desc = dmaengine_prep_slave_sg(chan,
data->sg, sglen, slave_dirn,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 11e589c..31747f9 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -411,7 +411,7 @@ static int mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data,
return -EINVAL;

dmaengine_slave_config(chan, &conf);
- desc = device->device_prep_slave_sg(chan, data->sg, nr_sg,
+ desc = dmaengine_prep_slave_sg(chan, data->sg, nr_sg,
conf.direction, DMA_CTRL_ACK);
if (!desc)
goto unmap_exit;
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 4184b79..411a79e 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -254,7 +254,7 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
if (nents != data->sg_len)
return -EINVAL;

- host->desc = host->dma->device->device_prep_slave_sg(host->dma,
+ host->desc = dmaengine_prep_slave_sg(host->dma,
data->sg, data->sg_len, slave_dirn,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);

diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 382c835..65f36cf 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -324,7 +324,7 @@ static struct dma_async_tx_descriptor *mxs_mmc_prep_dma(
sg_len = SSP_PIO_NUM;
}

- desc = host->dmach->device->device_prep_slave_sg(host->dmach,
+ desc = dmaengine_prep_slave_sg(host->dmach,
sgl, sg_len, host->slave_dirn, append);
if (desc) {
desc->callback = mxs_mmc_dma_irq_callback;
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 352d479..4002a82 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -285,7 +285,7 @@ static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host)
DMA_FROM_DEVICE);
if (ret > 0) {
host->dma_active = true;
- desc = chan->device->device_prep_slave_sg(chan, sg, ret,
+ desc = dmaengine_prep_slave_sg(chan, sg, ret,
DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
}

@@ -334,7 +334,7 @@ static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host)
DMA_TO_DEVICE);
if (ret > 0) {
host->dma_active = true;
- desc = chan->device->device_prep_slave_sg(chan, sg, ret,
+ desc = dmaengine_prep_slave_sg(chan, sg, ret,
DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
}

diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index 8253ec1..fff9286 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -88,7 +88,7 @@ static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)

ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE);
if (ret > 0)
- desc = chan->device->device_prep_slave_sg(chan, sg, ret,
+ desc = dmaengine_prep_slave_sg(chan, sg, ret,
DMA_DEV_TO_MEM, DMA_CTRL_ACK);

if (desc) {
@@ -169,7 +169,7 @@ static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)

ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE);
if (ret > 0)
- desc = chan->device->device_prep_slave_sg(chan, sg, ret,
+ desc = dmaengine_prep_slave_sg(chan, sg, ret,
DMA_MEM_TO_DEV, DMA_CTRL_ACK);

if (desc) {
diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
index 7db6555..590dd5c 100644
--- a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
@@ -835,7 +835,7 @@ int gpmi_send_command(struct gpmi_nand_data *this)
| BM_GPMI_CTRL0_ADDRESS_INCREMENT
| BF_GPMI_CTRL0_XFER_COUNT(this->command_length);
pio[1] = pio[2] = 0;
- desc = channel->device->device_prep_slave_sg(channel,
+ desc = dmaengine_prep_slave_sg(channel,
(struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
if (!desc) {
@@ -848,8 +848,7 @@ int gpmi_send_command(struct gpmi_nand_data *this)

sg_init_one(sgl, this->cmd_buffer, this->command_length);
dma_map_sg(this->dev, sgl, 1, DMA_TO_DEVICE);
- desc = channel->device->device_prep_slave_sg(channel,
- sgl, 1, DMA_MEM_TO_DEV, 1);
+ desc = dmaengine_prep_slave_sg(channel, sgl, 1, DMA_MEM_TO_DEV, 1);
if (!desc) {
pr_err("step 2 error\n");
return -1;
@@ -880,8 +879,7 @@ int gpmi_send_data(struct gpmi_nand_data *this)
| BF_GPMI_CTRL0_ADDRESS(address)
| BF_GPMI_CTRL0_XFER_COUNT(this->upper_len);
pio[1] = 0;
- desc = channel->device->device_prep_slave_sg(channel,
- (struct scatterlist *)pio,
+ desc = dmaengine_prep_slave_sg(channel, (struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
if (!desc) {
pr_err("step 1 error\n");
@@ -890,7 +888,7 @@ int gpmi_send_data(struct gpmi_nand_data *this)

/* [2] send DMA request */
prepare_data_dma(this, DMA_TO_DEVICE);
- desc = channel->device->device_prep_slave_sg(channel, &this->data_sgl,
+ desc = dmaengine_prep_slave_sg(channel, &this->data_sgl,
1, DMA_MEM_TO_DEV, 1);
if (!desc) {
pr_err("step 2 error\n");
@@ -916,7 +914,7 @@ int gpmi_read_data(struct gpmi_nand_data *this)
| BF_GPMI_CTRL0_ADDRESS(BV_GPMI_CTRL0_ADDRESS__NAND_DATA)
| BF_GPMI_CTRL0_XFER_COUNT(this->upper_len);
pio[1] = 0;
- desc = channel->device->device_prep_slave_sg(channel,
+ desc = dmaengine_prep_slave_sg(channel,
(struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
if (!desc) {
@@ -926,8 +924,8 @@ int gpmi_read_data(struct gpmi_nand_data *this)

/* [2] : send DMA request */
prepare_data_dma(this, DMA_FROM_DEVICE);
- desc = channel->device->device_prep_slave_sg(channel, &this->data_sgl,
- 1, DMA_DEV_TO_MEM, 1);
+ desc = dmaengine_prep_slave_sg(channel, &this->data_sgl,
+ 1, DMA_DEV_TO_MEM, 1);
if (!desc) {
pr_err("step 2 error\n");
return -1;
@@ -972,8 +970,7 @@ int gpmi_send_page(struct gpmi_nand_data *this,
pio[4] = payload;
pio[5] = auxiliary;

- desc = channel->device->device_prep_slave_sg(channel,
- (struct scatterlist *)pio,
+ desc = dmaengine_prep_slave_sg(channel, (struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
if (!desc) {
pr_err("step 2 error\n");
@@ -1007,7 +1004,7 @@ int gpmi_read_page(struct gpmi_nand_data *this,
| BF_GPMI_CTRL0_ADDRESS(address)
| BF_GPMI_CTRL0_XFER_COUNT(0);
pio[1] = 0;
- desc = channel->device->device_prep_slave_sg(channel,
+ desc = dmaengine_prep_slave_sg(channel,
(struct scatterlist *)pio, 2,
DMA_TRANS_NONE, 0);
if (!desc) {
@@ -1036,7 +1033,7 @@ int gpmi_read_page(struct gpmi_nand_data *this,
pio[3] = geo->page_size;
pio[4] = payload;
pio[5] = auxiliary;
- desc = channel->device->device_prep_slave_sg(channel,
+ desc = dmaengine_prep_slave_sg(channel,
(struct scatterlist *)pio,
ARRAY_SIZE(pio), DMA_TRANS_NONE, 1);
if (!desc) {
@@ -1055,7 +1052,7 @@ int gpmi_read_page(struct gpmi_nand_data *this,
| BF_GPMI_CTRL0_ADDRESS(address)
| BF_GPMI_CTRL0_XFER_COUNT(geo->page_size);
pio[1] = 0;
- desc = channel->device->device_prep_slave_sg(channel,
+ desc = dmaengine_prep_slave_sg(channel,
(struct scatterlist *)pio, 2,
DMA_TRANS_NONE, 1);
if (!desc) {
diff --git a/drivers/net/ethernet/micrel/ks8842.c b/drivers/net/ethernet/micrel/ks8842.c
index 0a85690..554fef3 100644
--- a/drivers/net/ethernet/micrel/ks8842.c
+++ b/drivers/net/ethernet/micrel/ks8842.c
@@ -458,7 +458,7 @@ static int ks8842_tx_frame_dma(struct sk_buff *skb, struct net_device *netdev)
if (sg_dma_len(&ctl->sg) % 4)
sg_dma_len(&ctl->sg) += 4 - sg_dma_len(&ctl->sg) % 4;

- ctl->adesc = ctl->chan->device->device_prep_slave_sg(ctl->chan,
+ ctl->adesc = dmaengine_prep_slave_sg(ctl->chan,
&ctl->sg, 1, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);
if (!ctl->adesc)
@@ -570,7 +570,7 @@ static int __ks8842_start_new_rx_dma(struct net_device *netdev)

sg_dma_len(sg) = DMA_BUFFER_SIZE;

- ctl->adesc = ctl->chan->device->device_prep_slave_sg(ctl->chan,
+ ctl->adesc = dmaengine_prep_slave_sg(ctl->chan,
sg, 1, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP);

diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c
index 8418eb0..e6afb84 100644
--- a/drivers/spi/spi-dw-mid.c
+++ b/drivers/spi/spi-dw-mid.c
@@ -144,7 +144,7 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change)
dws->tx_sgl.dma_address = dws->tx_dma;
dws->tx_sgl.length = dws->len;

- txdesc = txchan->device->device_prep_slave_sg(txchan,
+ txdesc = dmaengine_prep_slave_sg(txchan,
&dws->tx_sgl,
1,
DMA_MEM_TO_DEV,
@@ -166,7 +166,7 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change)
dws->rx_sgl.dma_address = dws->rx_dma;
dws->rx_sgl.length = dws->len;

- rxdesc = rxchan->device->device_prep_slave_sg(rxchan,
+ rxdesc = dmaengine_prep_slave_sg(rxchan,
&dws->rx_sgl,
1,
DMA_DEV_TO_MEM,
diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c
index d46e55c..6db2887 100644
--- a/drivers/spi/spi-ep93xx.c
+++ b/drivers/spi/spi-ep93xx.c
@@ -633,8 +633,8 @@ ep93xx_spi_dma_prepare(struct ep93xx_spi *espi, enum dma_data_direction dir)
if (!nents)
return ERR_PTR(-ENOMEM);

- txd = chan->device->device_prep_slave_sg(chan, sgt->sgl, nents,
- slave_dirn, DMA_CTRL_ACK);
+ txd = dmaengine_prep_slave_sg(chan, sgt->sgl, nents,
+ slave_dirn, DMA_CTRL_ACK);
if (!txd) {
dma_unmap_sg(chan->device->dev, sgt->sgl, sgt->nents, dir);
return ERR_PTR(-ENOMEM);
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 2f9cb43..94ccede 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -1038,7 +1038,7 @@ static int configure_dma(struct pl022 *pl022)
goto err_tx_sgmap;

/* Send both scatterlists */
- rxdesc = rxchan->device->device_prep_slave_sg(rxchan,
+ rxdesc = dmaengine_prep_slave_sg(rxchan,
pl022->sgt_rx.sgl,
rx_sglen,
DMA_DEV_TO_MEM,
@@ -1046,7 +1046,7 @@ static int configure_dma(struct pl022 *pl022)
if (!rxdesc)
goto err_rxdesc;

- txdesc = txchan->device->device_prep_slave_sg(txchan,
+ txdesc = dmaengine_prep_slave_sg(txchan,
pl022->sgt_tx.sgl,
tx_sglen,
DMA_MEM_TO_DEV,
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 10182eb..8a06403 100644
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -1078,7 +1078,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
sg_dma_address(sg) = dma->rx_buf_dma + sg->offset;
}
sg = dma->sg_rx_p;
- desc_rx = dma->chan_rx->device->device_prep_slave_sg(dma->chan_rx, sg,
+ desc_rx = dmaengine_prep_slave_sg(dma->chan_rx, sg,
num, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc_rx) {
@@ -1123,7 +1123,7 @@ static void pch_spi_handle_dma(struct pch_spi_data *data, int *bpw)
sg_dma_address(sg) = dma->tx_buf_dma + sg->offset;
}
sg = dma->sg_tx_p;
- desc_tx = dma->chan_tx->device->device_prep_slave_sg(dma->chan_tx,
+ desc_tx = dmaengine_prep_slave_sg(dma->chan_tx,
sg, num, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc_tx) {
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 6800f5f..3e33bf3 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -481,7 +481,7 @@ static int pl011_dma_tx_refill(struct uart_amba_port *uap)
return -EBUSY;
}

- desc = dma_dev->device_prep_slave_sg(chan, &dmatx->sg, 1, DMA_MEM_TO_DEV,
+ desc = dmaengine_prep_slave_sg(chan, &dmatx->sg, 1, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dma_unmap_sg(dma_dev->dev, &dmatx->sg, 1, DMA_TO_DEVICE);
@@ -664,7 +664,6 @@ static void pl011_dma_rx_callback(void *data);
static int pl011_dma_rx_trigger_dma(struct uart_amba_port *uap)
{
struct dma_chan *rxchan = uap->dmarx.chan;
- struct dma_device *dma_dev;
struct pl011_dmarx_data *dmarx = &uap->dmarx;
struct dma_async_tx_descriptor *desc;
struct pl011_sgbuf *sgbuf;
@@ -675,8 +674,7 @@ static int pl011_dma_rx_trigger_dma(struct uart_amba_port *uap)
/* Start the RX DMA job */
sgbuf = uap->dmarx.use_buf_b ?
&uap->dmarx.sgbuf_b : &uap->dmarx.sgbuf_a;
- dma_dev = rxchan->device;
- desc = rxchan->device->device_prep_slave_sg(rxchan, &sgbuf->sg, 1,
+ desc = dmaengine_prep_slave_sg(rxchan, &sgbuf->sg, 1,
DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
/*
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 17ae657..61743bd 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -763,7 +763,7 @@ static int dma_handle_rx(struct eg20t_port *priv)

sg_dma_address(sg) = priv->rx_buf_dma;

- desc = priv->chan_rx->device->device_prep_slave_sg(priv->chan_rx,
+ desc = dmaengine_prep_slave_sg(priv->chan_rx,
sg, 1, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);

@@ -922,7 +922,7 @@ static unsigned int dma_handle_tx(struct eg20t_port *priv)
sg_dma_len(sg) = size;
}

- desc = priv->chan_tx->device->device_prep_slave_sg(priv->chan_tx,
+ desc = dmaengine_prep_slave_sg(priv->chan_tx,
priv->sg_tx_p, nent, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 7508579..872557f 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -1338,7 +1338,7 @@ static void sci_submit_rx(struct sci_port *s)
struct scatterlist *sg = &s->sg_rx[i];
struct dma_async_tx_descriptor *desc;

- desc = chan->device->device_prep_slave_sg(chan,
+ desc = dmaengine_prep_slave_sg(chan,
sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT);

if (desc) {
@@ -1453,7 +1453,7 @@ static void work_fn_tx(struct work_struct *work)

BUG_ON(!sg_dma_len(sg));

- desc = chan->device->device_prep_slave_sg(chan,
+ desc = dmaengine_prep_slave_sg(chan,
sg, s->sg_len_tx, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c
index 97cb459..03ad80f 100644
--- a/drivers/usb/musb/ux500_dma.c
+++ b/drivers/usb/musb/ux500_dma.c
@@ -119,8 +119,7 @@ static bool ux500_configure_channel(struct dma_channel *channel,
dma_chan->device->device_control(dma_chan, DMA_SLAVE_CONFIG,
(unsigned long) &slave_conf);

- dma_desc = dma_chan->device->
- device_prep_slave_sg(dma_chan, &sg, 1, direction,
+ dma_desc = dmaengine_prep_slave_sg(dma_chan, &sg, 1, direction,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!dma_desc)
return false;
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 72339bd..7b43093 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -783,9 +783,8 @@ static void usbhsf_dma_prepare_tasklet(unsigned long data)
sg_dma_address(&sg) = pkt->dma + pkt->actual;
sg_dma_len(&sg) = pkt->trans;

- desc = chan->device->device_prep_slave_sg(chan, &sg, 1, dir,
- DMA_PREP_INTERRUPT |
- DMA_CTRL_ACK);
+ desc = dmaengine_prep_slave_sg(chan, &sg, 1, dir,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc)
return;

diff --git a/drivers/video/mx3fb.c b/drivers/video/mx3fb.c
index 727a514..eec0d7b 100644
--- a/drivers/video/mx3fb.c
+++ b/drivers/video/mx3fb.c
@@ -337,7 +337,7 @@ static void sdc_enable_channel(struct mx3fb_info *mx3_fbi)

/* This enables the channel */
if (mx3_fbi->cookie < 0) {
- mx3_fbi->txd = dma_chan->device->device_prep_slave_sg(dma_chan,
+ mx3_fbi->txd = dmaengine_prep_slave_sg(dma_chan,
&mx3_fbi->sg[0], 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
if (!mx3_fbi->txd) {
dev_err(mx3fb->dev, "Cannot allocate descriptor on %d\n",
@@ -1091,7 +1091,7 @@ static int mx3fb_pan_display(struct fb_var_screeninfo *var,
if (mx3_fbi->txd)
async_tx_ack(mx3_fbi->txd);

- txd = dma_chan->device->device_prep_slave_sg(dma_chan, sg +
+ txd = dmaengine_prep_slave_sg(dma_chan, sg +
mx3_fbi->cur_ipu_buf, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT);
if (!txd) {
dev_err(fbi->device,
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 679b349..6e88f09 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -615,6 +615,22 @@ static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
return chan->device->device_prep_slave_sg(chan, &sg, 1, dir, flags);
}

+static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_sg(
+ struct dma_chan *chan, struct scatterlist *sgl, unsigned int sg_len,
+ enum dma_transfer_direction dir, unsigned long flags)
+{
+ return chan->device->device_prep_slave_sg(chan, sgl, sg_len,
+ dir, flags);
+}
+
+static inline struct dma_async_tx_descriptor *dmaengine_prep_dma_cyclic(
+ struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
+ size_t period_len, enum dma_transfer_direction dir)
+{
+ return chan->device->device_prep_dma_cyclic(chan, buf_addr, buf_len,
+ period_len, dir);
+}
+
static inline int dmaengine_terminate_all(struct dma_chan *chan)
{
return dmaengine_device_control(chan, DMA_TERMINATE_ALL, 0);
diff --git a/sound/soc/ep93xx/ep93xx-pcm.c b/sound/soc/ep93xx/ep93xx-pcm.c
index de83904..50593e5 100644
--- a/sound/soc/ep93xx/ep93xx-pcm.c
+++ b/sound/soc/ep93xx/ep93xx-pcm.c
@@ -142,11 +142,10 @@ static int ep93xx_pcm_dma_submit(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct ep93xx_runtime_data *rtd = runtime->private_data;
struct dma_chan *chan = rtd->dma_chan;
- struct dma_device *dma_dev = chan->device;
struct dma_async_tx_descriptor *desc;

rtd->pointer_bytes = 0;
- desc = dma_dev->device_prep_dma_cyclic(chan, runtime->dma_addr,
+ desc = dmaengine_prep_dma_cyclic(chan, runtime->dma_addr,
rtd->period_bytes * rtd->periods,
rtd->period_bytes,
rtd->dma_data.direction);
diff --git a/sound/soc/imx/imx-pcm-dma-mx2.c b/sound/soc/imx/imx-pcm-dma-mx2.c
index 5780c9b..c727123 100644
--- a/sound/soc/imx/imx-pcm-dma-mx2.c
+++ b/sound/soc/imx/imx-pcm-dma-mx2.c
@@ -157,7 +157,7 @@ static int snd_imx_pcm_hw_params(struct snd_pcm_substream *substream,

iprtd->buf = (unsigned int *)substream->dma_buffer.area;

- iprtd->desc = chan->device->device_prep_dma_cyclic(chan, dma_addr,
+ iprtd->desc = dmaengine_prep_dma_cyclic(chan, dma_addr,
iprtd->period_bytes * iprtd->periods,
iprtd->period_bytes,
substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
diff --git a/sound/soc/mxs/mxs-pcm.c b/sound/soc/mxs/mxs-pcm.c
index 105f42a..661b678 100644
--- a/sound/soc/mxs/mxs-pcm.c
+++ b/sound/soc/mxs/mxs-pcm.c
@@ -132,7 +132,7 @@ static int snd_mxs_pcm_hw_params(struct snd_pcm_substream *substream,

iprtd->buf = substream->dma_buffer.area;

- iprtd->desc = chan->device->device_prep_dma_cyclic(chan, dma_addr,
+ iprtd->desc = dmaengine_prep_dma_cyclic(chan, dma_addr,
iprtd->period_bytes * iprtd->periods,
iprtd->period_bytes,
substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
diff --git a/sound/soc/sh/siu_pcm.c b/sound/soc/sh/siu_pcm.c
index 0193e59..5cfcc65 100644
--- a/sound/soc/sh/siu_pcm.c
+++ b/sound/soc/sh/siu_pcm.c
@@ -130,7 +130,7 @@ static int siu_pcm_wr_set(struct siu_port *port_info,
sg_dma_len(&sg) = size;
sg_dma_address(&sg) = buff;

- desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
+ desc = dmaengine_prep_slave_sg(siu_stream->chan,
&sg, 1, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(dev, "Failed to allocate a dma descriptor\n");
@@ -180,7 +180,7 @@ static int siu_pcm_rd_set(struct siu_port *port_info,
sg_dma_len(&sg) = size;
sg_dma_address(&sg) = buff;

- desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
+ desc = dmaengine_prep_slave_sg(siu_stream->chan,
&sg, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc) {
dev_err(dev, "Failed to allocate dma descriptor\n");
diff --git a/sound/soc/txx9/txx9aclc.c b/sound/soc/txx9/txx9aclc.c
index 2155461..b609d2c 100644
--- a/sound/soc/txx9/txx9aclc.c
+++ b/sound/soc/txx9/txx9aclc.c
@@ -132,7 +132,7 @@ txx9aclc_dma_submit(struct txx9aclc_dmadata *dmadata, dma_addr_t buf_dma_addr)
sg_set_page(&sg, pfn_to_page(PFN_DOWN(buf_dma_addr)),
dmadata->frag_bytes, buf_dma_addr & (PAGE_SIZE - 1));
sg_dma_address(&sg) = buf_dma_addr;
- desc = chan->device->device_prep_slave_sg(chan, &sg, 1,
+ desc = dmaengine_prep_slave_sg(chan, &sg, 1,
dmadata->substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
--
1.7.8.4

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