From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5E2FEC433B4 for ; Sun, 2 May 2021 14:08:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2393E61026 for ; Sun, 2 May 2021 14:08:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233764AbhEBOI4 (ORCPT ); Sun, 2 May 2021 10:08:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:51056 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233386AbhEBOGV (ORCPT ); Sun, 2 May 2021 10:06:21 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 49F76613CF; Sun, 2 May 2021 14:05:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619964326; bh=w9591fGVC5JVawAIStz3BWOnN9vNdV3PcZforyawNXY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DG5+7Q+lO1isPIYElFKdxemtpQZfT/KuPn0th6p58QX5fNgIM1ZR5kFYdWAERT0mO gBshbXBOePFaGYyX50L4A4GGBPvDm3z405wcyGcEwcdKASuojMCcCkkcUnENQKIuhY uxGISaTtooSgCEgInesk9WwiyxyhvS5J6rPG1g9GZlLcNRApOknqKZB6KDdMXt0e2A FZGbBK+O4ZK0ZfHWZbWosP5Ft7ffM4uejGGxVP6h9Cp9LdRo5bs454zUV9L+wOTwTg UOp/nicKpuJdk9K6AoV501pwjFAFz6gCGuUfyr652Z1ch1pcc4YFQHInsXL0DFuYBO EASFy+JpT0K+A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wesley Cheng , Greg Kroah-Hartman , Sasha Levin , linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 06/21] usb: dwc3: gadget: Ignore EP queue requests during bus reset Date: Sun, 2 May 2021 10:05:02 -0400 Message-Id: <20210502140517.2719912-6-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210502140517.2719912-1-sashal@kernel.org> References: <20210502140517.2719912-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wesley Cheng [ Upstream commit 71ca43f30df9c642970f9dc9b2d6f463f4967e7b ] The current dwc3_gadget_reset_interrupt() will stop any active transfers, but only addresses blocking of EP queuing for while we are coming from a disconnected scenario, i.e. after receiving the disconnect event. If the host decides to issue a bus reset on the device, the connected parameter will still be set to true, allowing for EP queuing to continue while we are disabling the functions. To avoid this, set the connected flag to false until the stop active transfers is complete. Signed-off-by: Wesley Cheng Link: https://lore.kernel.org/r/1616146285-19149-3-git-send-email-wcheng@codeaurora.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/dwc3/gadget.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index a0806dca3de9..f28eb541fad3 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2717,6 +2717,15 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc) dwc->connected = true; + /* + * Ideally, dwc3_reset_gadget() would trigger the function + * drivers to stop any active transfers through ep disable. + * However, for functions which defer ep disable, such as mass + * storage, we will need to rely on the call to stop active + * transfers here, and avoid allowing of request queuing. + */ + dwc->connected = false; + /* * WORKAROUND: DWC3 revisions <1.88a have an issue which * would cause a missing Disconnect Event if there's a -- 2.30.2