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

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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>
This commit is contained in:
John Youn 2016-05-19 17:26:10 -07:00 • committed by Felipe Balbi
parent 0d25744ad1
commit 89bc856e5a
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/dwc3/gadget.c
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@ -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)