From patchwork Tue Jun 1 22:51:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sudeep Holla X-Patchwork-Id: 12292405 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=-17.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 52627C4708F for ; Tue, 1 Jun 2021 22:55:56 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 121D1613BD for ; Tue, 1 Jun 2021 22:55:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 121D1613BD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=sFh5V/g4Z6EORFF7s8Nbs7QZbownndFB68toQjW8W3A=; b=FJw/clqcUg+mqa x3KVoZBN0fKqNOGZknq/AdQFJoQfKm80u84dDxQ+Qq1vrqVtUka1Wc5+cDl2Aw1i+A7VyOTjMQ1Ej /0KdD0WuI1qdgYc/T+hzMdmCecp1awNphGyrKklIF0Zu/FjqM1DfIx9rse44wcjEcLzDE5cMmAu+N MmFJh9c2tUzjhOY3E2OBhp68qLCP21tB9+PLgU+AdMjwraaM488+D9wWdhNT9gkLdZClFekKFwzLK bNwZSXXagqSasTHUkqlOc8PpOJmZ94gQqFQInknutnPWndt/rcsKLAejsUBVq4vfjLXRpnITEYEqG wj6bQ4gPfG9YK0VI/vbw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1loDHR-0017wI-0o; Tue, 01 Jun 2021 22:54:37 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1loDEQ-0016PS-5U for linux-arm-kernel@lists.infradead.org; Tue, 01 Jun 2021 22:51:31 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 22BC71042; Tue, 1 Jun 2021 15:51:29 -0700 (PDT) Received: from usa.arm.com (e103737-lin.cambridge.arm.com [10.1.197.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id E12913F719; Tue, 1 Jun 2021 15:51:27 -0700 (PDT) From: Sudeep Holla To: linux-arm-kernel@lists.infradead.org Cc: Sudeep Holla , Cristian Marussi , Kevin Hilman , Neil Armstrong , Jerome Brunet , Florian Fainelli , Jim Quinlan , Etienne Carriere Subject: [PATCH 2/2] firmware: arm_scmi: Add compatibility checks for shmem node Date: Tue, 1 Jun 2021 23:51:25 +0100 Message-Id: <20210601225125.918225-2-sudeep.holla@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210601225125.918225-1-sudeep.holla@arm.com> References: <20210601225125.918225-1-sudeep.holla@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210601_155130_295219_6FD2F95E X-CRM114-Status: GOOD ( 11.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The shared memory node used for communication between the firmware and the OS should be compatible with "arm,scmi-shmem". Add the check for the same while parsing the node before fetching the memory regions. Cc: Cristian Marussi Cc: Florian Fainelli Cc: Jim Quinlan Cc: Etienne Carriere Signed-off-by: Sudeep Holla --- drivers/firmware/arm_scmi/mailbox.c | 3 +++ drivers/firmware/arm_scmi/smc.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/drivers/firmware/arm_scmi/mailbox.c b/drivers/firmware/arm_scmi/mailbox.c index 4626404be541..e3dcb58314ae 100644 --- a/drivers/firmware/arm_scmi/mailbox.c +++ b/drivers/firmware/arm_scmi/mailbox.c @@ -69,6 +69,9 @@ static int mailbox_chan_setup(struct scmi_chan_info *cinfo, struct device *dev, return -ENOMEM; shmem = of_parse_phandle(cdev->of_node, "shmem", idx); + if (!of_device_is_compatible(shmem, "arm,scmi-shmem")) + return -ENXIO; + ret = of_address_to_resource(shmem, 0, &res); of_node_put(shmem); if (ret) { diff --git a/drivers/firmware/arm_scmi/smc.c b/drivers/firmware/arm_scmi/smc.c index fcbe2677f84b..78198ef94438 100644 --- a/drivers/firmware/arm_scmi/smc.c +++ b/drivers/firmware/arm_scmi/smc.c @@ -76,6 +76,9 @@ static int smc_chan_setup(struct scmi_chan_info *cinfo, struct device *dev, return -ENOMEM; np = of_parse_phandle(cdev->of_node, "shmem", 0); + if (!of_device_is_compatible(shmem, "arm,scmi-shmem")) + return -ENXIO; + ret = of_address_to_resource(np, 0, &res); of_node_put(np); if (ret) {