usb: dwc3: gadget: Allow restarting a transfer

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It's possible that there's no new TRBs prepared when kicking a transfer.
This happens when we need to stop and restart a transfer such as in the
case of reinitiating a stream or retrying isoc transfer. For streams,
sometime host may reject a stream and the device may need to reinitiate
that stream by stopping and restarting a transfer. In this case, all the
TRBs may have already been prepared. Allow the function
__dwc3_gadget_kick_transfer() to go through even though there's no new
TRB.

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

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Thinh Nguyen 2020-09-29 00:18:48 -07:00 • committed by Felipe Balbi

parent a73abc28ce

commit d72ecc08de

1 changed files with 6 additions and 1 deletions

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drivers/usb/dwc3/gadget.c

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