From patchwork Mon Jul 10 06:24:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 13306282 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 A81E2C0015E for ; Mon, 10 Jul 2023 06:26:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231163AbjGJG0Y (ORCPT ); Mon, 10 Jul 2023 02:26:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231299AbjGJGZ6 (ORCPT ); Mon, 10 Jul 2023 02:25:58 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 51C65E78; Sun, 9 Jul 2023 23:25:50 -0700 (PDT) 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 10BD9D75; Sun, 9 Jul 2023 23:26:32 -0700 (PDT) Received: from a077893.blr.arm.com (a077893.blr.arm.com [10.162.40.20]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id E14BB3F67D; Sun, 9 Jul 2023 23:25:43 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org, suzuki.poulose@arm.com, gregkh@linuxfoundation.org, rafael@kernel.org Cc: Anshuman Khandual , Ganapatrao Kulkarni , Steve Clevenger , Rob Herring , Frank Rowand , Russell King , Len Brown , Sudeep Holla , Lorenzo Pieralisi , Mathieu Poirier , Mike Leach , Leo Yan , devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V6 5/6] coresight: platform: acpi: Ignore the absence of graph Date: Mon, 10 Jul 2023 11:54:59 +0530 Message-Id: <20230710062500.45147-6-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230710062500.45147-1-anshuman.khandual@arm.com> References: <20230710062500.45147-1-anshuman.khandual@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.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 3e2e135cb8f6..c8940314cceb 100644 --- a/drivers/hwtracing/coresight/coresight-platform.c +++ b/drivers/hwtracing/coresight/coresight-platform.c @@ -669,8 +669,12 @@ static int acpi_coresight_parse_graph(struct device *dev, struct coresight_connection *new_conn; 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)