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usb: gadget: udc: core: Fix argument of dma_map_single for IOMMU

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The dma_map_single and dma_unmap_single should set "gadget->dev.parent"
instead of "&gadget->dev" in the first argument because the parent has
a udc controller's device pointer.
Otherwise, iommu functions are not called in ARM environment.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Yoshihiro Shimoda 2015-07-13 18:10:05 +09:00 committed by Felipe Balbi
parent 53e20f2eb1
commit 7ace8fc821
1 changed files with 8 additions and 6 deletions
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14
drivers/usb/gadget/udc/udc-core.c
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@ -60,13 +60,15 @@ static DEFINE_MUTEX(udc_lock);
int usb_gadget_map_request(struct usb_gadget *gadget,
struct usb_request *req, int is_in)
{
struct device *dev = gadget->dev.parent;
if (req->length == 0)
return 0;
if (req->num_sgs) {
int mapped;
mapped = dma_map_sg(&gadget->dev, req->sg, req->num_sgs,
mapped = dma_map_sg(dev, req->sg, req->num_sgs,
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
if (mapped == 0) {
dev_err(&gadget->dev, "failed to map SGs\n");
@ -75,11 +77,11 @@ int usb_gadget_map_request(struct usb_gadget *gadget,
req->num_mapped_sgs = mapped;
} else {
req->dma = dma_map_single(&gadget->dev, req->buf, req->length,
req->dma = dma_map_single(dev, req->buf, req->length,
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
if (dma_mapping_error(&gadget->dev, req->dma)) {
dev_err(&gadget->dev, "failed to map buffer\n");
if (dma_mapping_error(dev, req->dma)) {
dev_err(dev, "failed to map buffer\n");
return -EFAULT;
}
}
@ -95,12 +97,12 @@ void usb_gadget_unmap_request(struct usb_gadget *gadget,
return;
if (req->num_mapped_sgs) {
dma_unmap_sg(&gadget->dev, req->sg, req->num_mapped_sgs,
dma_unmap_sg(gadget->dev.parent, req->sg, req->num_mapped_sgs,
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
req->num_mapped_sgs = 0;
} else {
dma_unmap_single(&gadget->dev, req->dma, req->length,
dma_unmap_single(gadget->dev.parent, req->dma, req->length,
is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
}
}