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

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>

diff --git a/drivers/usb/gadget/udc/udc-core.c b/drivers/usb/gadget/udc/udc-core.c
index d69c355..362ee8a 100644 (file)
--- a/drivers/usb/gadget/udc/udc-core.c
+++ b/drivers/usb/gadget/udc/udc-core.c
@@ -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);
        }
 }