usb: dwc3: gadget: Return early if no TRB update

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If the transfer had already started and there's no TRB to update, then
there's no need to go through __dwc3_gadget_kick_transfer(). There is
no problem reissuing UPDATE_TRANSFER command. This change just saves
the driver from doing a few operations. This happens when we run out of
TRB and function driver still queues for more requests.

Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

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Thinh Nguyen 2020-09-30 17:44:38 -07:00 • committed by Felipe Balbi

parent 346a15cdf6

commit 2338484d14

1 changed files with 7 additions and 0 deletions

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drivers/usb/dwc3/gadget.c

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