ata/pata_arasan_cf: fill dma chan->private from pdata->dma_priv
Some DMA controllers (eg: drivers/dma/dw_dmac*) allow platform specific
configuration for dma transfers. User drivers need to set chan->private field
of channel with pointer to configuration data. This patch takes dma_priv data
from platform data and passes it to chan->private_data, in order to pass
platform specific configuration to DMAC controller.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
diff --git a/drivers/ata/pata_arasan_cf.c b/drivers/ata/pata_arasan_cf.c
index 8b060c4..65cee74 100644
--- a/drivers/ata/pata_arasan_cf.c
+++ b/drivers/ata/pata_arasan_cf.c
@@ -210,6 +210,8 @@
struct dma_chan *dma_chan;
/* Mask for DMA transfers */
dma_cap_mask_t mask;
+ /* dma channel private data */
+ void *dma_priv;
/* DMA transfer work */
struct work_struct work;
/* DMA delayed finish work */
@@ -356,6 +358,7 @@
static bool filter(struct dma_chan *chan, void *slave)
{
+ chan->private = slave;
return true;
}
@@ -526,7 +529,8 @@
/* request dma channels */
/* dma_request_channel may sleep, so calling from process context */
- acdev->dma_chan = dma_request_channel(acdev->mask, filter, NULL);
+ acdev->dma_chan = dma_request_channel(acdev->mask, filter,
+ acdev->dma_priv);
if (!acdev->dma_chan) {
dev_err(acdev->host->dev, "Unable to get dma_chan\n");
goto chan_request_fail;
@@ -853,6 +857,7 @@
INIT_WORK(&acdev->work, data_xfer);
INIT_DELAYED_WORK(&acdev->dwork, delayed_finish);
dma_cap_set(DMA_MEMCPY, acdev->mask);
+ acdev->dma_priv = pdata->dma_priv;
/* Handle platform specific quirks */
if (pdata->quirk) {