usb: dwc3: gadget: drop the useless dma_sync_single* calls

if req->dma isn't DMA_ADDR_INVALID it means gadget driver
mapped the request or allocated from coherent, so it's
unnecessary to do anything.

Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 6c64c73..2ea2fc8 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -71,11 +71,6 @@ void dwc3_map_buffer_to_dma(struct dwc3_request *req)
                                req->request.length, req->direction
                                ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
                req->mapped = true;
-       } else {
-               dma_sync_single_for_device(dwc->dev, req->request.dma,
-                               req->request.length, req->direction
-                               ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-               req->mapped = false;
        }
 }
 
@@ -94,10 +89,6 @@ void dwc3_unmap_buffer_from_dma(struct dwc3_request *req)
                                ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
                req->mapped = 0;
                req->request.dma = DMA_ADDR_INVALID;
-       } else {
-               dma_sync_single_for_cpu(dwc->dev, req->request.dma,
-                               req->request.length, req->direction
-                               ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
        }
 }