usb: dwc3: clean TRB if STARTTRANSFER fail

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In case STARTTRANSFER will fail, clean TRB.
Seems HW in such case don't clean HWO bit.
So, without this cleanup prev_trb still have
HWO bit set.

In my case (without patch), after first START failed:
- dep->enqueue == 1
- dep->dequeue == 1
- prev_trb still have HWO set
- left_trb() == 0
No way to send more data.

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

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Janusz Dziedzic 2016-11-09 11:01:32 +01:00 • committed by Felipe Balbi

parent 8ab89da4c2

commit ce3fc8b329

1 changed files with 2 additions and 0 deletions

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drivers/usb/dwc3/gadget.c

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