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

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,