From patchwork Tue Dec 22 10:57:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud Pouliquen X-Patchwork-Id: 11986321 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=-18.8 required=3.0 tests=BAYES_00,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=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 7F0BDC4332D for ; Tue, 22 Dec 2020 10:59:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 440EF23428 for ; Tue, 22 Dec 2020 10:59:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726697AbgLVK6y (ORCPT ); Tue, 22 Dec 2020 05:58:54 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:39096 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726475AbgLVK6x (ORCPT ); Tue, 22 Dec 2020 05:58:53 -0500 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 0BMAw5bQ004484; Tue, 22 Dec 2020 11:58:07 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=selector1; bh=dvvXlfzm0tzQLnZ/koaGqjFe70fZMQECn12d7ShvXeY=; b=Auf47oorCjoi4zwl3e1NglH2aw+d1y/G2f4VD6PUxFPRyklsD6MVpC43AsCIcPHOL75I uxF9UtGmyJGbOxZwQfZnKjjLoXBNKeA/wXNqfR0oL+h8zvST5Yv8AxXG5LZ4hqkPqj79 y2PJsSwJFWXLScitpwEhgTcz+QVGNnvqzNfCD3oPhXCB84HdhB/6lNIfKSK3JLpXLHZX ZSNHOU3uNL6ihLHCzA76VSdrUC0mXD5msIorfuARyKPdSjlxUzbsUDNL66ct8ALEqcDt HkIEdnViyJWMMVruBxdhJlakdHmHnvcB0WJTW0NZJ0MIvzQy+oi8V0/7GTjZhT3Sy4mQ NQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 35k0cgky56-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 22 Dec 2020 11:58:07 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id A6E9710002A; Tue, 22 Dec 2020 11:58:06 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 9925022ECB0; Tue, 22 Dec 2020 11:58:06 +0100 (CET) Received: from localhost (10.75.127.48) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 22 Dec 2020 11:58:06 +0100 From: Arnaud Pouliquen To: Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier , Andy Gross CC: , , , , Subject: [PATCH v2 10/16] rpmsg: char: allow only one endpoint per device Date: Tue, 22 Dec 2020 11:57:20 +0100 Message-ID: <20201222105726.16906-11-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201222105726.16906-1-arnaud.pouliquen@foss.st.com> References: <20201222105726.16906-1-arnaud.pouliquen@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.48] X-ClientProxiedBy: SFHDAG2NODE1.st.com (10.75.127.4) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2020-12-22_04:2020-12-21,2020-12-22 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Only one endpoint can be created per device, prevent from multi open. Signed-off-by: Arnaud Pouliquen --- drivers/rpmsg/rpmsg_char.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index 66e01b979e72..4b0674a2e3e9 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -122,6 +122,9 @@ static int rpmsg_eptdev_open(struct inode *inode, struct file *filp) struct rpmsg_device *rpdev = eptdev->rpdev; struct device *dev = &eptdev->dev; + if (eptdev->ept) + return -EBUSY; + get_device(dev); ept = rpmsg_create_ept(rpdev, rpmsg_ept_cb, eptdev, eptdev->chinfo);