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dwc3: flush cache only if there is a buffer attached to a request

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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>
This commit is contained in:
Marek Szyprowski 2019-10-02 14:19:14 +02:00 committed by Marek Vasut
parent d2d8eab421
commit fd15b58c1a
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/dwc3/gadget.c
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@ -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;