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(parent: 346a15c) | patch
usb: dwc3: gadget: Return early if no TRB update
authorThinh Nguyen <Thinh.Nguyen@synopsys.com>
Thu, 1 Oct 2020 00:44:38 +0000 (17:44 -0700)
committerFelipe Balbi <balbi@kernel.org>
Fri, 2 Oct 2020 06:57:46 +0000 (09:57 +0300)
commit2338484d14f3f4b3bd1f7bb416805976e7bd0cc5
tree2177fe5f337f99efbab2a18076a836114f9c3639tree | snapshot
parent346a15cdf65263d8a8dfdbc5d2702471a2dcef6ccommit | diff
usb: dwc3: gadget: Return early if no TRB update

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>
drivers/usb/dwc3/gadget.c diff | blob | history
Domain: System / Kernel;