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Subject[PATCH 13/18] fotg210-udc: pass struct device to DMA API functions
Date
The DMA API generally relies on a struct device to work properly, and
only barely works without one for legacy reasons. Pass the easily
available struct device from the platform_device to remedy this.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/usb/gadget/udc/fotg210-udc.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c
index fe9cf415f2f1..cec49294bac6 100644
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -326,6 +326,7 @@ static void fotg210_wait_dma_done(struct fotg210_ep *ep)
static void fotg210_start_dma(struct fotg210_ep *ep,
struct fotg210_request *req)
{
+ struct device *dev = &ep->fotg210->gadget.dev;
dma_addr_t d;
u8 *buffer;
u32 length;
@@ -348,10 +349,10 @@ static void fotg210_start_dma(struct fotg210_ep *ep,
length = req->req.length;
}

- d = dma_map_single(NULL, buffer, length,
+ d = dma_map_single(dev, buffer, length,
ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);

- if (dma_mapping_error(NULL, d)) {
+ if (dma_mapping_error(dev, d)) {
pr_err("dma_mapping_error\n");
return;
}
@@ -366,7 +367,7 @@ static void fotg210_start_dma(struct fotg210_ep *ep,
/* update actual transfer length */
req->req.actual += length;

- dma_unmap_single(NULL, d, length, DMA_TO_DEVICE);
+ dma_unmap_single(dev, d, length, DMA_TO_DEVICE);
}

static void fotg210_ep0_queue(struct fotg210_ep *ep,
--
2.20.1
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