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usb: dwc3: gadget: stop kicking if we run out of space

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In case our TRB ring is full, we can avoid trying to
kick transfers which won't start and just add requests
to the queue.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Felipe Balbi 2016-08-24 14:38:10 +03:00
parent 7ae7df4982
commit 594e121f25
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/dwc3/gadget.c
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@ -1082,6 +1082,9 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
return 0;
}
if (!dwc3_calc_trbs_left(dep))
return 0;
ret = __dwc3_gadget_kick_transfer(dep, 0);
if (ret && ret != -EBUSY)
dwc3_trace(trace_dwc3_gadget,