usb: dwc3: gadget: Handle TRB index 0 when full or empty

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If the trb->enqueue == trb->dequeue, then it could be full or empty.
This could also happen at TRB index 0, so modify the check to handle
that condition. At index 0, the previous TRB is the one just before the
link TRB.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

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John Youn 2016-05-19 17:26:17 -07:00 • committed by Felipe Balbi

parent 7d0a038b13

commit 361572b5f7

1 changed files with 22 additions and 6 deletions

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drivers/usb/dwc3/gadget.c

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