diff options
Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 0c934a195deb..1de4d3f87569 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -61,6 +61,11 @@ void dwc3_map_buffer_to_dma(struct dwc3_request *req) { struct dwc3 *dwc = req->dep->dwc; + if (req->request.length == 0) { + /* req->request.dma = dwc->setup_buf_addr; */ + return; + } + if (req->request.dma == DMA_ADDR_INVALID) { req->request.dma = dma_map_single(dwc->dev, req->request.buf, req->request.length, req->direction @@ -78,6 +83,11 @@ void dwc3_unmap_buffer_from_dma(struct dwc3_request *req) { struct dwc3 *dwc = req->dep->dwc; + if (req->request.length == 0) { + req->request.dma = DMA_ADDR_INVALID; + return; + } + if (req->mapped) { dma_unmap_single(dwc->dev, req->request.dma, req->request.length, req->direction |