From patchwork Thu Oct 22 22:44:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thinh Nguyen X-Patchwork-Id: 11852087 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 33A016A2 for ; Thu, 22 Oct 2020 22:45:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 07D59221EB for ; Thu, 22 Oct 2020 22:45:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="GS0Eb/DZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S373080AbgJVWpB (ORCPT ); Thu, 22 Oct 2020 18:45:01 -0400 Received: from smtprelay-out1.synopsys.com ([149.117.73.133]:51178 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S373010AbgJVWpB (ORCPT ); Thu, 22 Oct 2020 18:45:01 -0400 Received: from mailhost.synopsys.com (sv1-mailhost1.synopsys.com [10.205.2.131]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id E0C9D427AC; Thu, 22 Oct 2020 22:45:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1603406700; bh=DDQVeRa/me0kMyPuy45QTehC7ujAYJEstZEMcrO4T0A=; h=Date:From:Subject:To:Cc:From; b=GS0Eb/DZuAXg4ze+9b13ode5i/ionskx5Z5wFmHuRdN/AVsmu8Vokau3K2xopBWBq viBwjudCbb7B6ylKYkrYmUj1euPMi/4u+ZQD6MohCzanj/14abWa2jV70a8QQ4aJGc rO0y8ngrGVIe1dJaWKu0pTHptUrF60YWSevQINkXhxc8d5ARUiDPQJ8abhgV9cWN1d wZrSiBq+1GpTf1FJ1+5BTPVvMxEQHroaz1C6q7Baap9MGTA2BaGTCSVWAKxRth2ubq cif7SgQhLJC/7q6Jyupw3CG3nwlAJBjFBmINQL4mE3wbD3fQmVzpdSfIhY1AowTqwR wqOkR+9d23pDg== Received: from te-lab16 (nanobot.internal.synopsys.com [10.10.186.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailhost.synopsys.com (Postfix) with ESMTPSA id A01ABA005E; Thu, 22 Oct 2020 22:44:59 +0000 (UTC) Received: by te-lab16 (sSMTP sendmail emulation); Thu, 22 Oct 2020 15:44:59 -0700 Date: Thu, 22 Oct 2020 15:44:59 -0700 Message-Id: X-SNPS-Relay: synopsys.com From: Thinh Nguyen Subject: [PATCH] usb: dwc3: ep0: Fix delay status handling To: Felipe Balbi , Greg Kroah-Hartman , linux-usb@vger.kernel.org Cc: John Youn , stable@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org If we want to send a control status on our own time (through delayed_status), make sure to handle a case where we may queue the delayed status before the host requesting for it (when XferNotReady is generated). Otherwise, the driver won't send anything because it's not EP0_STATUS_PHASE yet. To resolve this, regardless whether dwc->ep0state is EP0_STATUS_PHASE, make sure to clear the dwc->delayed_status flag if dwc3_ep0_send_delayed_status() is called. The control status can be sent when the host requests it later. Cc: Fixes: d97c78a1908e ("usb: dwc3: gadget: END_TRANSFER before CLEAR_STALL command") Signed-off-by: Thinh Nguyen --- drivers/usb/dwc3/ep0.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) base-commit: 270315b8235e3d10c2e360cff56c2f9e0915a252 diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 7be3903cb842..8b668ef46f7f 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -1058,10 +1058,11 @@ void dwc3_ep0_send_delayed_status(struct dwc3 *dwc) { unsigned int direction = !dwc->ep0_expect_in; + dwc->delayed_status = false; + if (dwc->ep0state != EP0_STATUS_PHASE) return; - dwc->delayed_status = false; __dwc3_ep0_do_control_status(dwc, dwc->eps[direction]); }