Wesley Cheng <wcheng@xxxxxxxxxxxxxx> writes:
> During a USB cable disconnect, or soft disconnect scenario, a pending
> SETUP transaction may not be completed, leading to the following
> error:
>
> dwc3 a600000.dwc3: timed out waiting for SETUP phase
>
> If this occurs, then the entire pullup disable routine is skipped and
> proper cleanup and halting of the controller does not complete.
nit: might want to add a blank line between paragraphs to aid
readability
> Instead of returning an error (which is ignored from the UDC
> perspective), allow the pullup disable to routine to continue, which
^^
remove this?
> will also handle disabling of EP0/1. This will end any active
> transfers as well. Ensure to clear any delayed_status as well, as the
> timeout could happen within the STATUS stage.
>
> Signed-off-by: Wesley Cheng <wcheng@xxxxxxxxxxxxxx>
> ---
> Changes in v2:
> - Removed calls to dwc3_ep0_end_control_data() and just allow the ep disables
> on EP0 handle the proper ending of transfers.
> - Ensure that delayed_status is cleared, as ran into enumeration issues if the
> SETUP transaction fails on a STATUS stage. Saw delayed_status == TRUE on the
> next connect, which blocked further SETUP transactions to be handled.
>
> drivers/usb/dwc3/gadget.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index 5d084542718d..8b6a95c35741 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -2430,7 +2430,6 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
> msecs_to_jiffies(DWC3_PULL_UP_TIMEOUT));
> if (ret == 0) {
> dev_err(dwc->dev, "timed out waiting for SETUP phase\n");
> - return -ETIMEDOUT;
> }
Since the `if' now has a single statement, you should remove the curly braces.
--
balbi
