From patchwork Tue May 23 04:45:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 13251509 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id CE202C77B7A for ; Tue, 23 May 2023 04:47:16 +0000 (UTC) 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=JcXXWAeVSJUqql6tUb1yNfrGDRxBUNczRX5q996o/hI=; b=R10at9/Mri4vMM OkeaU26flHg5IKkt0KI4KIdTYK2EpRJC0v/HVLSufKbFuRLfVPsBpYLI9A0KTopkS0aodzw43e8UE cqvrsrF5NkZUrNjCcCVizW0ITSgHowpJNV1K3IROIEip2NqR2KBPzqKgypFb4oFMEse3av0c6/Z1C p/d9L7qODW1XzkQ5YjbTPSTVUTpNueff3m5/K9dV402gIP3Ri2XC6Fk6OardvFeuSDiUuQALOginH 9u5/jisBqgPQQF2oxJFisna/DM3k6xiEknZtXHDvCsVrwyK6DxiWlrTmWf/nhLk0lbeZ/+oVH9sIA IlCVhWgWCPJiSZn0JVBg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q1JvD-008tbm-0i; Tue, 23 May 2023 04:46:55 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q1Jv5-008tYb-2c for linux-arm-kernel@lists.infradead.org; Tue, 23 May 2023 04:46:49 +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 784B4139F; Mon, 22 May 2023 21:47:29 -0700 (PDT) Received: from a077893.blr.arm.com (unknown [10.162.42.7]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 80E6F3F6C4; Mon, 22 May 2023 21:46:38 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org, suzuki.poulose@arm.com Cc: Anshuman Khandual , Ganapatrao Kulkarni , Steve Clevenger , Rob Herring , Frank Rowand , Russell King , Greg Kroah-Hartman , "Rafael J. Wysocki" , Len Brown , Sudeep Holla , Lorenzo Pieralisi , Mathieu Poirier , Mike Leach , Leo Yan , devicetree@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [PATCH V4 5/6] coresight: platform: acpi: Ignore the absence of graph Date: Tue, 23 May 2023 10:15:52 +0530 Message-Id: <20230523044553.1525048-6-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230523044553.1525048-1-anshuman.khandual@arm.com> References: <20230523044553.1525048-1-anshuman.khandual@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230522_214647_905863_7F38CFE2 X-CRM114-Status: GOOD ( 11.79 ) 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 From: Suzuki K Poulose Some components may not have graph connections for describing the trace path. e.g., ETE, where it could directly use the per CPU TRBE. Ignore the absence of graph connections Signed-off-by: Suzuki K Poulose Signed-off-by: Anshuman Khandual --- drivers/hwtracing/coresight/coresight-platform.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c index 475899714104..c4b4fbde8550 100644 --- a/drivers/hwtracing/coresight/coresight-platform.c +++ b/drivers/hwtracing/coresight/coresight-platform.c @@ -692,8 +692,12 @@ static int acpi_coresight_parse_graph(struct acpi_device *adev, pdata->nr_inport = pdata->nr_outport = 0; graph = acpi_get_coresight_graph(adev); + /* + * There are no graph connections, which is fine for some components. + * e.g., ETE + */ if (!graph) - return -ENOENT; + return 0; nlinks = graph->package.elements[2].integer.value; if (!nlinks)