From 77fa6df82f154535293beb9bc68851f75c2c22cb Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Mon, 23 Jul 2012 09:09:32 +0300 Subject: [PATCH] usb: dwc3: ep0: ignore XferNotReady(STATUS) when we're not expecting it Databook doesn't say we should stall if we get XferNotReady(STATUS) while we're expecting something else. Instead of stalling and restarting, tests have proven that ignoring the event is far more effective. This problem has been caught while rewriting ep0 handling in order we pass Link Layer TD7.6. Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/ep0.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index d4b38c72a0ac..39abc589187a 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -953,19 +953,13 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc, break; case DEPEVT_STATUS_CONTROL_STATUS: + if (dwc->ep0_next_event != DWC3_EP0_NRDY_STATUS) + return; + dev_vdbg(dwc->dev, "Control Status\n"); dwc->ep0state = EP0_STATUS_PHASE; - if (dwc->ep0_next_event != DWC3_EP0_NRDY_STATUS) { - dev_vdbg(dwc->dev, "Expected %d got %d\n", - dwc->ep0_next_event, - DWC3_EP0_NRDY_STATUS); - - dwc3_ep0_stall_and_restart(dwc); - return; - } - if (dwc->delayed_status) { WARN_ON_ONCE(event->endpoint_number != 1); dev_vdbg(dwc->dev, "Mass Storage delayed status\n"); -- GitLab