tree 20aafb531e0e393848637e50a785a9b38a7073fa
parent 15f86bde29f0fdfb877d9c753547fa2e2f5ef1fe
author Pratyush Anand <pratyush.anand@st.com> 1358159374 +0530
committer Felipe Balbi <balbi@ti.com> 1358512182 +0200

usb: dwc3: gadget: fix isoc END TRANSFER Condition

There were still some corner cases where isoc transfer was not able to
restart, specially when missed isoc does not happen , and in fact gadget does
not queue any new request during giveback.

Cleanup function calls giveback first, which provides a way to queue
another request to gadget. But gadget did not had any data. So , it did
not call ep_queue. To twist it further, gadget did not queue till
cleanup for last queued TRB is called. If we ever reach this scenario,
we must call END TRANSFER, so that we receive a new  xfernotready with
information about current microframe number.

Also insure that there is no request submitted to core when issuing END
TRANSFER.

Cc: <stable@vger.kernel.org> # v3.8
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>