usb: dwc3: gadget: check if dep->frame_number is still valid

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Gadget driver may take an unbounded amount of time to queue requests
after XferNotReady. This is important for isochronous endpoints which
need to be started for a specific (micro-)frame.

If we fail to start a transfer for isochronous endpoint, let's try
queueing to a future interval and see if that helps. We will stop trying
if we fail a start transfer for 5 intervals in the future.

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

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This commit is contained in:

Felipe Balbi 2018-08-14 10:42:43 +03:00

parent 3451f6affa

commit d53701067f

2 changed files with 13 additions and 3 deletions

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1

drivers/usb/dwc3/core.h

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15

drivers/usb/dwc3/gadget.c

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