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=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 DF48BC43387 for ; Fri, 11 Jan 2019 06:02:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AF34E20675 for ; Fri, 11 Jan 2019 06:02:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="dcsQxIkQ"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="dcsQxIkQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729345AbfAKGCZ (ORCPT ); Fri, 11 Jan 2019 01:02:25 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:47408 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727846AbfAKGCZ (ORCPT ); Fri, 11 Jan 2019 01:02:25 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 7773C608CC; Fri, 11 Jan 2019 06:02:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1547186544; bh=SH94WpQExnUoO5RLz6hLFLfFG8ZQRAV8pjzksEY8rT0=; h=From:To:Cc:Subject:Date:From; b=dcsQxIkQ1X7ZgIRC6SCH1Xxvo9RcKSg1YnVj5JzMf+kuKKFC6g5faXbe8GFpDW+EV +8sggYHZTsS8oiBgfdWY+OsaT2Rr2P6YmPQScAXWYzzKLIScYUdpqlO19RW48RImHk I7qVtjFW83s1/KCKi7C9r/KrcqYmjGrmJl3nPdnI= Received: from mgautam-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mgautam@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 03764601B4; Fri, 11 Jan 2019 06:02:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1547186544; bh=SH94WpQExnUoO5RLz6hLFLfFG8ZQRAV8pjzksEY8rT0=; h=From:To:Cc:Subject:Date:From; b=dcsQxIkQ1X7ZgIRC6SCH1Xxvo9RcKSg1YnVj5JzMf+kuKKFC6g5faXbe8GFpDW+EV +8sggYHZTsS8oiBgfdWY+OsaT2Rr2P6YmPQScAXWYzzKLIScYUdpqlO19RW48RImHk I7qVtjFW83s1/KCKi7C9r/KrcqYmjGrmJl3nPdnI= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 03764601B4 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=mgautam@codeaurora.org From: Manu Gautam To: Felipe Balbi Cc: linux-arm-msm@vger.kernel.org, Manu Gautam , Greg Kroah-Hartman , linux-usb@vger.kernel.org (open list:DESIGNWARE USB3 DRD IP DRIVER), linux-kernel@vger.kernel.org (open list) Subject: [PATCH] usb: dwc3: gadget: Fail request submission if it was already queued Date: Fri, 11 Jan 2019 11:32:12 +0530 Message-Id: <20190111060212.7390-1-mgautam@codeaurora.org> X-Mailer: git-send-email 2.19.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If a function driver tries to re-submit an already queued request, it can results in corruption of pending/started request lists. Catch such conditions and fail the request submission to DCD. Signed-off-by: Manu Gautam --- drivers/usb/dwc3/gadget.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 679c12e14522..51716c6b286a 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1290,6 +1290,12 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) &req->request, req->dep->name)) return -EINVAL; + if (req->request.status == -EINPROGRESS) { + dev_err(dwc->dev, "%s: %pK request already in queue\n", + dep->name, req); + return -EBUSY; + } + pm_runtime_get(dwc->dev); req->request.actual = 0; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project