From: Thinh Nguyen Thinh.Nguyen@synopsys.com
commit 2dedea035ae82c5af0595637a6eda4655532b21e upstream.
When skipping TRBs, we need to account for wrapping around the ring buffer and not modifying some invalid TRBs. Without this fix, dwc3 won't be able to check for available TRBs.
Cc: stable stable@vger.kernel.org Fixes: 7746a8dfb3f9 ("usb: dwc3: gadget: extract dwc3_gadget_ep_skip_trbs()") Signed-off-by: Thinh Nguyen thinhn@synopsys.com Signed-off-by: Felipe Balbi balbi@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/usb/dwc3/gadget.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index d482f89..8133ccc 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1369,7 +1369,7 @@ static void dwc3_gadget_ep_skip_trbs(struct dwc3_ep *dep, struct dwc3_request *r for (i = 0; i < req->num_trbs; i++) { struct dwc3_trb *trb;
- trb = req->trb + i; + trb = &dep->trb_pool[dep->trb_dequeue]; trb->ctrl &= ~DWC3_TRB_CTRL_HWO; dwc3_ep_inc_deq(dep); }