From patchwork Mon Mar 29 07:58:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 411599 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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 B55DBC433EA for ; Mon, 29 Mar 2021 08:07:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6C6B961959 for ; Mon, 29 Mar 2021 08:07:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231953AbhC2IGt (ORCPT ); Mon, 29 Mar 2021 04:06:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:49074 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232283AbhC2IFr (ORCPT ); Mon, 29 Mar 2021 04:05:47 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A772B61932; Mon, 29 Mar 2021 08:05:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617005147; bh=BHsNB7quJZdZFvbZOrwC2cF4dGnW5p9yOwa4oPSFHmQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2ZKSLWjz27pyWchikbdvUW54pvndgO2olb7QXumQQG4JeIL91fyCys8vm/2CpgUl/ nlXKdsmu8ZfaDT0YX+Uw19Vk5RSjjKg8yhUK9VFkhyW7rVog6cKQt4KPEySgj5iyw9 7hsRJLKej0LxE2hPXV6VldtGGrA0CYcuKqmHlA5I= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold , "David S. Miller" , Sasha Levin Subject: [PATCH 4.14 42/59] net: cdc-phonet: fix data-interface release on probe failure Date: Mon, 29 Mar 2021 09:58:22 +0200 Message-Id: <20210329075610.271037779@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075608.898173317@linuxfoundation.org> References: <20210329075608.898173317@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johan Hovold [ Upstream commit c79a707072fe3fea0e3c92edee6ca85c1e53c29f ] Set the disconnected flag before releasing the data interface in case netdev registration fails to avoid having the disconnect callback try to deregister the never registered netdev (and trigger a WARN_ON()). Fixes: 87cf65601e17 ("USB host CDC Phonet network interface driver") Signed-off-by: Johan Hovold Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/usb/cdc-phonet.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/usb/cdc-phonet.c b/drivers/net/usb/cdc-phonet.c index 288ecd999171..7a18eb0784f3 100644 --- a/drivers/net/usb/cdc-phonet.c +++ b/drivers/net/usb/cdc-phonet.c @@ -398,6 +398,8 @@ static int usbpn_probe(struct usb_interface *intf, const struct usb_device_id *i err = register_netdev(dev); if (err) { + /* Set disconnected flag so that disconnect() returns early. */ + pnd->disconnected = 1; usb_driver_release_interface(&usbpn_driver, data_intf); goto out; }