From patchwork Thu Feb 4 08:45:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaud POULIQUEN X-Patchwork-Id: 377125 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=-18.7 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, URIBL_BLOCKED, 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 55FE3C433E6 for ; Thu, 4 Feb 2021 08:48:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 14FD064F65 for ; Thu, 4 Feb 2021 08:48:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235186AbhBDIrn (ORCPT ); Thu, 4 Feb 2021 03:47:43 -0500 Received: from mx07-00178001.pphosted.com ([185.132.182.106]:36308 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235161AbhBDIra (ORCPT ); Thu, 4 Feb 2021 03:47:30 -0500 Received: from pps.filterd (m0241204.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 1148kaox000463; Thu, 4 Feb 2021 09:46:43 +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=MuyXJB7WjUr+M+1phw3VLrgCeO68qXJXMtTO20gRugM=; b=OdD6FZc+Iqv+QMDMCkjZrgq7IdxJ4c9JDNuT+6d8mVhLcrGfDdGrqPqUKe1525z3xGUg eyHpIGgf0Sk5buAFBRCVzt6jhDSUA8Dtgi/TofjEHn1GWJR8ci5Jxls+qXw+r94AR4VU IVJAKXCxMBEWrmhYcpjnk5qWRcwxyrvC7HVeY8covzyQMweyXyVUVeHiCeZt57lP3eSg M3B8Y/EFvzq+1L+12unc8NcZ/hWlwFK8byQUGhhZaZtYMa07kS4/BKcmOaYtgmL/g1fz szK1n4pj9vvenDm7R9nllsRY3Dd2FpETuLOJCgV/C8FK6L3TUMsaIZpBM4+MpREwABqT Rw== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 36ey7h7g1p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 04 Feb 2021 09:46:43 +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 CE01810002A; Thu, 4 Feb 2021 09:46:42 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id C183A22AE52; Thu, 4 Feb 2021 09:46:42 +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; Thu, 4 Feb 2021 09:46:42 +0100 From: Arnaud Pouliquen To: Bjorn Andersson , Ohad Ben-Cohen , Mathieu Poirier , Andy Gross CC: , , , , Subject: [PATCH v3 14/15] rpmsg: char: no dynamic endpoint management for the default one Date: Thu, 4 Feb 2021 09:45:33 +0100 Message-ID: <20210204084534.10516-15-arnaud.pouliquen@foss.st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210204084534.10516-1-arnaud.pouliquen@foss.st.com> References: <20210204084534.10516-1-arnaud.pouliquen@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.48] X-ClientProxiedBy: SFHDAG2NODE3.st.com (10.75.127.6) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.737 definitions=2021-02-04_03:2021-02-04,2021-02-04 signatures=0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Do not dynamically manage the default endpoint. The ept address must not change. This update is needed to manage the RPMSG_CREATE_DEV_IOCTL. In this case a default endpoint is used and it's address must not change or been reused by another service. Signed-off-by: Arnaud Pouliquen --- drivers/rpmsg/rpmsg_char.c | 28 +++++++++++++++++++++------- 1 file changed, 21 insertions(+), 7 deletions(-) diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index d5aa874865f7..0b0a6b7c0c9a 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/drivers/rpmsg/rpmsg_char.c @@ -114,14 +114,23 @@ static int rpmsg_eptdev_open(struct inode *inode, struct file *filp) struct rpmsg_endpoint *ept; struct rpmsg_device *rpdev = eptdev->rpdev; struct device *dev = &eptdev->dev; + u32 addr = eptdev->chinfo.src; get_device(dev); - ept = rpmsg_create_ept(rpdev, rpmsg_ept_cb, eptdev, eptdev->chinfo); - if (!ept) { - dev_err(dev, "failed to open %s\n", eptdev->chinfo.name); - put_device(dev); - return -EINVAL; + /* + * The ept device can has been created by a ns announcement. In this + * case a default endpoint has been created. Reuse it to avoid to manage + * a new address on each open close. + */ + ept = rpdev->ept; + if (!ept || addr != ept->addr) { + ept = rpmsg_create_ept(rpdev, rpmsg_ept_cb, eptdev, eptdev->chinfo); + if (!ept) { + dev_err(dev, "failed to open %s\n", eptdev->chinfo.name); + put_device(dev); + return -EINVAL; + } } eptdev->ept = ept; @@ -133,12 +142,17 @@ static int rpmsg_eptdev_open(struct inode *inode, struct file *filp) static int rpmsg_eptdev_release(struct inode *inode, struct file *filp) { struct rpmsg_eptdev *eptdev = cdev_to_eptdev(inode->i_cdev); + struct rpmsg_device *rpdev = eptdev->rpdev; struct device *dev = &eptdev->dev; - /* Close the endpoint, if it's not already destroyed by the parent */ + /* + * Close the endpoint, if it's not already destroyed by the parent and it is not the + * default one. + */ mutex_lock(&eptdev->ept_lock); if (eptdev->ept) { - rpmsg_destroy_ept(eptdev->ept); + if (eptdev->ept != rpdev->ept) + rpmsg_destroy_ept(eptdev->ept); eptdev->ept = NULL; } mutex_unlock(&eptdev->ept_lock);