From mboxrd@z Thu Jan 1 00:00:00 1970 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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 448DBC46471 for ; Mon, 6 Aug 2018 13:43:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 07ED321534 for ; Mon, 6 Aug 2018 13:43:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 07ED321534 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732549AbeHFPwo (ORCPT ); Mon, 6 Aug 2018 11:52:44 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:38946 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732529AbeHFPwo (ORCPT ); Mon, 6 Aug 2018 11:52:44 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D302115AD; Mon, 6 Aug 2018 06:43:33 -0700 (PDT) Received: from en101.Emea.Arm.com (en101.emea.arm.com [10.4.13.23]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A23BD3F2EA; Mon, 6 Aug 2018 06:43:32 -0700 (PDT) From: Suzuki K Poulose To: linux-arm-kernel@lists.infradead.org Cc: mathieu.poirier@linaro.org, linux-kernel@vger.kernel.org, robert.walker@arm.com, mike.leach@arm.com, Suzuki K Poulose Subject: [PATCH 13/13] coreisght: tmc: Claim device before use Date: Mon, 6 Aug 2018 14:41:55 +0100 Message-Id: <1533562915-21558-14-git-send-email-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1533562915-21558-1-git-send-email-suzuki.poulose@arm.com> References: <1533562915-21558-1-git-send-email-suzuki.poulose@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use CLAIM tags to make sure the device is available for use. Cc: Mathieu Poirier Signed-off-by: Suzuki K Poulose --- drivers/hwtracing/coresight/coresight-tmc-etf.c | 22 +++++++++++++++++++--- drivers/hwtracing/coresight/coresight-tmc-etr.c | 4 ++++ 2 files changed, 23 insertions(+), 3 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c index ceb4b30..59d862d6e 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etf.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c @@ -36,6 +36,11 @@ static void __tmc_etb_enable_hw(struct tmc_drvdata *drvdata) static int tmc_etb_enable_hw(struct tmc_drvdata *drvdata) { + int rc = coresight_claim_device(drvdata->base); + + if (rc) + return rc; + __tmc_etb_enable_hw(drvdata); return 0; } @@ -66,7 +71,7 @@ static void tmc_etb_dump_hw(struct tmc_drvdata *drvdata) return; } -static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata) +static void __tmc_etb_disable_hw(struct tmc_drvdata *drvdata) { CS_UNLOCK(drvdata->base); @@ -82,6 +87,12 @@ static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata) CS_LOCK(drvdata->base); } +static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata) +{ + coresight_disclaim_device(drvdata); + __tmc_etb_disable_hw(drvdata); +} + static void __tmc_etf_enable_hw(struct tmc_drvdata *drvdata) { CS_UNLOCK(drvdata->base); @@ -100,6 +111,11 @@ static void __tmc_etf_enable_hw(struct tmc_drvdata *drvdata) static int tmc_etf_enable_hw(struct tmc_drvdata *drvdata) { + int rc = coresight_claim_device(drvdata->base); + + if (rc) + return rc; + __tmc_etf_enable_hw(drvdata); return 0; } @@ -110,7 +126,7 @@ static void tmc_etf_disable_hw(struct tmc_drvdata *drvdata) tmc_flush_and_stop(drvdata); tmc_disable_hw(drvdata); - + coresight_disclaim_device_unlocked(drvdata->base); CS_LOCK(drvdata->base); } @@ -556,7 +572,7 @@ int tmc_read_prepare_etb(struct tmc_drvdata *drvdata) /* Disable the TMC if need be */ if (drvdata->mode == CS_MODE_SYSFS) - tmc_etb_disable_hw(drvdata); + __tmc_etb_disable_hw(drvdata); drvdata->reading = true; out: diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c index daad521..f684283 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c @@ -991,6 +991,9 @@ static int tmc_etr_enable_hw(struct tmc_drvdata *drvdata, * this on. */ rc = tmc_etr_enable_catu(drvdata, etr_buf); + if (rc) + return rc; + rc = coresight_claim_device(drvdata->base); if (!rc) { drvdata->etr_buf = etr_buf; __tmc_etr_enable_hw(drvdata); @@ -1077,6 +1080,7 @@ static void tmc_etr_disable_hw(struct tmc_drvdata *drvdata) __tmc_etr_disable_hw(drvdata); /* Disable CATU device if this ETR is connected to one */ tmc_etr_disable_catu(drvdata); + coresight_disclaim_device(drvdata->base); /* Reset the ETR buf used by hardware */ drvdata->etr_buf = NULL; } -- 2.7.4