Calling cache flush on invalid buffer, even with zero length might cause an exception on certain platforms.

Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- drivers/usb/dwc3/gadget.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 085f7b8968..67d11b4c0d 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -242,7 +242,8 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,

list_del(&req->list); req->trb = NULL; - dwc3_flush_cache((uintptr_t)req->request.dma, req->request.length); + if (req->request.length) + dwc3_flush_cache((uintptr_t)req->request.dma, req->request.length);

if (req->request.status == -EINPROGRESS) req->request.status = status;