usb: dwc3: gadget: Delay starting transfer

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commit da10bcdd6f upstream.

If the END_TRANSFER command hasn't completed yet, then don't send the
START_TRANSFER command. The controller may not be able to start if
that's the case. Some controller revisions depend on this. See
commit 76a638f8ac ("usb: dwc3: gadget: wait for End Transfer to
complete"). Let's only send START_TRANSFER command after the
END_TRANSFER command had completed.

Fixes: 3aec99154d ("usb: dwc3: gadget: remove DWC3_EP_END_TRANSFER_PENDING")
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Thinh Nguyen 2019-12-18 18:14:50 -08:00 • committed by Greg Kroah-Hartman

parent 59267167ed

commit 5289945fdf

2 changed files with 12 additions and 0 deletions

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1

drivers/usb/dwc3/core.h

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11

drivers/usb/dwc3/gadget.c

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