From patchwork Wed Feb 16 08:12:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Puranjay Mohan X-Patchwork-Id: 12748152 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 8FC3AC433FE for ; Wed, 16 Feb 2022 08:12:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231487AbiBPIND (ORCPT ); Wed, 16 Feb 2022 03:13:03 -0500 Received: from gmail-smtp-in.l.google.com ([23.128.96.19]:40500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231504AbiBPINA (ORCPT ); Wed, 16 Feb 2022 03:13:00 -0500 Received: from lelv0143.ext.ti.com (lelv0143.ext.ti.com [198.47.23.248]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FF4817226F; Wed, 16 Feb 2022 00:12:48 -0800 (PST) Received: from fllv0034.itg.ti.com ([10.64.40.246]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 21G8CfOT020144; Wed, 16 Feb 2022 02:12:41 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1644999161; bh=L3o6viKp+9KP+Ivv8wMZofS9DdBqsiGNMjqvAUCvnec=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=uIBjswu6fJqUiDp1DWkFd0gpTvEvi9Y9PLk9Gm1YqD0Ft2q9/8gv6XzrCmUK1pWmR 14iC7DaBBvyzNOFMQ3mFuha2ECqkecQ2OiCZGUp44ocnEYmwUZfUJD9h5ZetcIx1/n EQLx4Wj2KuYGW3HF/wuzEMAb7RXw/1pFBZlNfHq4= Received: from DLEE100.ent.ti.com (dlee100.ent.ti.com [157.170.170.30]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 21G8CfSh009945 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 16 Feb 2022 02:12:41 -0600 Received: from DLEE105.ent.ti.com (157.170.170.35) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Wed, 16 Feb 2022 02:12:40 -0600 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE105.ent.ti.com (157.170.170.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Wed, 16 Feb 2022 02:12:40 -0600 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 21G8CdW4032955; Wed, 16 Feb 2022 02:12:40 -0600 From: Puranjay Mohan To: , , , , , , , CC: Puranjay Mohan Subject: [PATCH v5 2/2] remoteproc: wkup_m3: Set sysfs_read_only flag Date: Wed, 16 Feb 2022 13:42:24 +0530 Message-ID: <20220216081224.9956-3-p-mohan@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220216081224.9956-1-p-mohan@ti.com> References: <20220216081224.9956-1-p-mohan@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org From: Suman Anna The Wakeup M3 remote processor is controlled by the wkup_m3_ipc client driver, so set the newly introduced 'sysfs_read_only' flag to not allow any overriding of the remoteproc firmware, state, recovery, or coredump from userspace. Signed-off-by: Suman Anna Signed-off-by: Puranjay Mohan Reviewed-by: Mathieu Poirier --- Changes in v4->v5 rename deny_sysfs_ops to sysfs_read_only --- drivers/remoteproc/wkup_m3_rproc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/remoteproc/wkup_m3_rproc.c b/drivers/remoteproc/wkup_m3_rproc.c index 484f7605823e..a0c204cb0979 100644 --- a/drivers/remoteproc/wkup_m3_rproc.c +++ b/drivers/remoteproc/wkup_m3_rproc.c @@ -163,6 +163,7 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev) } rproc->auto_boot = false; + rproc->sysfs_read_only = true; wkupm3 = rproc->priv; wkupm3->rproc = rproc;