From: Wesley Cheng <quic_wcheng@xxxxxxxxxxx> [ Upstream commit 9711c67de7482c81e1daca3548fbc5c9603600e3 ] Ensure that there are no pending events being handled in between soft connect/disconnect transitions. As we are keeping interrupts enabled, and EP0 events are still being serviced, this avoids any stale events from being serviced. Reviewed-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx> Signed-off-by: Wesley Cheng <quic_wcheng@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20220817182359.13550-4-quic_wcheng@xxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Stable-dep-of: c8540870af4c ("usb: dwc3: gadget: Improve dwc3_gadget_suspend() and dwc3_gadget_resume()") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/usb/dwc3/gadget.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index d76a4837615d9..b2ffc98c9e747 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2540,6 +2540,8 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on) return 0; } + synchronize_irq(dwc->irq_gadget); + if (!is_on) { ret = dwc3_gadget_soft_disconnect(dwc); } else { -- 2.40.1
