From patchwork Mon Sep 11 00:24:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 721710 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2FB07EEB580 for ; Mon, 11 Sep 2023 00:25:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231829AbjIKAZC (ORCPT ); Sun, 10 Sep 2023 20:25:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57732 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230266AbjIKAZB (ORCPT ); Sun, 10 Sep 2023 20:25:01 -0400 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [IPv6:2a0a:edc0:2:b01:1d::104]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B63151A5 for ; Sun, 10 Sep 2023 17:24:56 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qfUjW-0008TH-9f; Mon, 11 Sep 2023 02:24:54 +0200 Received: from [2a0a:edc0:0:1101:1d::ac] (helo=dude04.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1qfUjV-005QgS-8s; Mon, 11 Sep 2023 02:24:53 +0200 Received: from mgr by dude04.red.stw.pengutronix.de with local (Exim 4.96) (envelope-from ) id 1qfUjV-00C03E-05; Mon, 11 Sep 2023 02:24:53 +0200 From: Michael Grzeschik To: laurent.pinchart@ideasonboard.com Cc: linux-usb@vger.kernel.org, linux-media@vger.kernel.org, dan.scally@ideasonboard.com, gregkh@linuxfoundation.org, nicolas@ndufresne.ca, kernel@pengutronix.de Subject: [PATCH 2/3] usb: gadget: uvc: cleanup request when not in correct state Date: Mon, 11 Sep 2023 02:24:50 +0200 Message-Id: <20230911002451.2860049-3-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230911002451.2860049-1-m.grzeschik@pengutronix.de> References: <20230911002451.2860049-1-m.grzeschik@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The uvc_video_enable function of the uvc-gadget driver is dequeing and immediately deallocs all requests on its disable codepath. This is not save since the dequeue function is async and does not ensure that the requests are left unlinked in the controller driver. By adding the ep_free_request into the completion path of the requests we ensure that the request will be properly deallocated. Signed-off-by: Michael Grzeschik --- drivers/usb/gadget/function/uvc_video.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index 4b6e854e30c58c..52e3666b51f743 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -256,6 +256,12 @@ uvc_video_complete(struct usb_ep *ep, struct usb_request *req) struct uvc_device *uvc = video->uvc; unsigned long flags; + if (uvc->state == UVC_STATE_CONNECTED) { + usb_ep_free_request(video->ep, ureq->req); + ureq->req = NULL; + return; + } + switch (req->status) { case 0: break;