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 5C425C433ED for ; Sun, 2 May 2021 14:08:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3B4D56102A for ; Sun, 2 May 2021 14:08:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232524AbhEBOJo (ORCPT ); Sun, 2 May 2021 10:09:44 -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 S233367AbhEBOGx (ORCPT ); Sun, 2 May 2021 10:06:53 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 16983613C7; Sun, 2 May 2021 14:05:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619964351; bh=K4VxfRdlHMv/KHvkR1/3xCGjraQQ5uaFcWEMcRL0Jsk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ItR4IWK/X4nNhSR4ypSMqDgKKZfz2KT6UFwvlYOqkHGbvjZ6oJ5sk+L6xbBJj97Zl ePDheaEvdz0UIpZkG1tBqA/p0+OVNDB5m43mPJ2vQ4uAXtJCoIrJ3rBZSZDbljcAwz QTLc0gEo8RukQHwomkGr0U0oUvZtGLfKe5R0Rsn7AXPYeN3DhcCuF/mS44MNy8Eblj bR2e1Ez4y93uAqbrj7/TtrO60/G4G73KzdEboFfoTpjBXBM2xUmX8EYIL2OfevJotC IXsjOXBwOWuyeJDg3e7S+I8AWnrMBK5GnvSm5x359fCEeS2vBB9aGBoLwkrYwMOxFE uZ5cvOPA3IrGA== 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 4.14 05/16] usb: dwc3: gadget: Ignore EP queue requests during bus reset Date: Sun, 2 May 2021 10:05:33 -0400 Message-Id: <20210502140544.2720138-5-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210502140544.2720138-1-sashal@kernel.org> References: <20210502140544.2720138-1-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 510ed406fb0b..909e8aafd580 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2695,6 +2695,15 @@ 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