From nobody Mon Feb 9 15:08:35 2026 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 0073EEB64DD for ; Tue, 1 Aug 2023 09:44:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233441AbjHAJn7 (ORCPT ); Tue, 1 Aug 2023 05:43:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45222 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233269AbjHAJni (ORCPT ); Tue, 1 Aug 2023 05:43:38 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id A6CF25240 for ; Tue, 1 Aug 2023 02:41:17 -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 1FDCD1424; Tue, 1 Aug 2023 02:42:00 -0700 (PDT) Received: from a077893.arm.com (unknown [10.163.53.114]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 93CB23F5A1; Tue, 1 Aug 2023 02:41:13 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, suzuki.poulose@arm.com Cc: Anshuman Khandual , Mike Leach , Leo Yan , Alexander Shishkin , coresight@lists.linaro.org, linux-kernel@vger.kernel.org Subject: [PATCH V2 3/4] coresight: trbe: Add a representative coresight_platform_data for TRBE Date: Tue, 1 Aug 2023 15:10:51 +0530 Message-Id: <20230801094052.750416-4-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230801094052.750416-1-anshuman.khandual@arm.com> References: <20230801094052.750416-1-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" TRBE coresight devices do not need regular connections information, as the paths get built between all percpu source and their respective percpu sink devices. Please refer 'commit 2cd87a7b293d ("coresight: core: Add support for dedicated percpu sinks")' which added support for percpu sink devices. coresight_register() expect device connections via the platform_data. TRBE devices do not have any graph connections and thus is empty. With upcoming ACPI support for TRBE, we do not get a real acpi_device and thus coresight_get_platform_dat() will end up in failures. Hence this allocates a zeroed coresight_platform_data structure and assigns that back into the device. Cc: Suzuki K Poulose Cc: Mike Leach Cc: Leo Yan Cc: Alexander Shishkin Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- drivers/hwtracing/coresight/coresight-trbe.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtraci= ng/coresight/coresight-trbe.c index 7720619909d6..e1d9d06e7725 100644 --- a/drivers/hwtracing/coresight/coresight-trbe.c +++ b/drivers/hwtracing/coresight/coresight-trbe.c @@ -1494,9 +1494,9 @@ static int arm_trbe_device_probe(struct platform_devi= ce *pdev) if (!drvdata) return -ENOMEM; =20 - pdata =3D coresight_get_platform_data(dev); - if (IS_ERR(pdata)) - return PTR_ERR(pdata); + pdata =3D devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; =20 dev_set_drvdata(dev, drvdata); dev->platform_data =3D pdata; --=20 2.25.1