Commit 2dedea03 authored Mar 05, 2020 by Thinh Nguyen Committed by Felipe Balbi Mar 15, 2020

usb: dwc3: gadget: Wrap around when skip TRBs



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: 7746a8df ("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>

parent a114c4ca

drivers/usb/dwc3/gadget.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1521,7 +1521,7 @@ 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);
		}

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