Commit 89bc856e authored May 19, 2016 by John Youn Committed by Felipe Balbi Jun 20, 2016

usb: dwc3: gadget: Don't prepare TRBs if no space



If trbs_left == 0, we don't have any space left in the TRB ring so don't
prepare anything.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

parent 0d25744a

drivers/usb/dwc3/gadget.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -942,6 +942,8 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep)
		BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM);

		trbs_left = dwc3_calc_trbs_left(dep);
		if (!trbs_left)
		return;

		list_for_each_entry_safe(req, n, &dep->pending_list, list) {
		if (req->request.num_mapped_sgs > 0)