usb: dwc3: gadget: set request dma to invalid when unmapping

if we don't set DMA address to invalid when unmapping,
we might fall in a situation where request buffer
can't be mapped to DMA again.

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

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 2ee6714..4d232c3 100644 (file)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -83,6 +83,7 @@ void dwc3_unmap_buffer_from_dma(struct dwc3_request *req)
                                req->request.length, req->direction
                                ? 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