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 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 8D0C8C53219 for ; Sat, 25 Jul 2026 11:37:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=iU0hw9wRsQnxoEPhBRnCjle+PfxE4tvw3wIDOOT3QZg=; b=Yt2eydfnQLJXp+YuJDJlngSpWr eh1X42tMs6GfwkL4BhQ5LYFhYqp7wLsWcJZiyDV2BVhOqCLGaXI1DrN6Kw9S3df211fe7VtQEv4CN IWvLbPYI9caNMEtjDJFufEDYgPaT41gDCwyPK7MwM+Tn+Xk01CAVGaMI5mymwW9AtaNOHau/97g86 xAP3gIshfjgEROHxmoITbOBMj96lqzAGElMDwgCFMVe//vDXprDNYB8bCPVi9X7LCV/nRX9AgBx9J dm19ekqMuDQtBdZMvdrIeSb+fcBwQpVUTzDbpPa9yTO4z1yNA4KcP4ovQvmsI1bErxYQ5QoOfjA6m jfxmGerw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wnah5-00000000IQ4-3DnQ; Sat, 25 Jul 2026 11:37:27 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wnagp-00000000IGK-1LTk for linux-arm-kernel@lists.infradead.org; Sat, 25 Jul 2026 11:37:12 +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 3D5731476; Sat, 25 Jul 2026 04:37:04 -0700 (PDT) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.2.213.3]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id DB39E3F86F; Sat, 25 Jul 2026 04:37:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1784979428; bh=188AIDbMY1v/sDiWYppH+U+SiageqLxgU3HJYaHaZLU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TXicx+AO63HUENlK4eVJlP9De5vGIk2GA2+5bVfpveyhRVQnQVymtwu8w3MH5CHdc 9kjUi1OlR1G4rsSSztH1f+HDaFH7BB//rcrWvQ4CAFFxQRzs/MfsI+7Fz6bLbXOZV6 KiyR+I3yVxh2eqQDyICRFa0B3bEq6/KRCeNWFz5g= From: Yeoreum Yun To: coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: suzuki.poulose@arm.com, mike.leach@arm.com, james.clark@linaro.org, alexander.shishkin@linux.intel.com, leo.yan@arm.com, jie.gan@oss.qualcomm.com, Yeoreum Yun Subject: [PATCH v9 05/13] coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable Date: Sat, 25 Jul 2026 12:36:37 +0100 Message-ID: <20260725113645.57519-6-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260725113645.57519-1-yeoreum.yun@arm.com> References: <20260725113645.57519-1-yeoreum.yun@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260725_043711_642935_903C5AB2 X-CRM114-Status: GOOD ( 15.69 ) 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 In the perf enable path, there are missing cases where cscfg_csdev_disable_active_config() is not called: - Branch broadcast is selected but not supported by the hardware - etm4_enable_hw() fails This can lead to a leak of config_desc->active_cnt. Fix this by properly calling cscfg_csdev_disable_active_config() in these error paths. Fixes: 810ac401db1f ("coresight: etm4x: Add complex configuration handlers to etmv4") Suggested-by: Leo Yan Signed-off-by: Yeoreum Yun --- .../coresight/coresight-etm4x-core.c | 44 +++++++++++-------- 1 file changed, 25 insertions(+), 19 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c index 8fac6416f3fa..02b91a67b00b 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c @@ -785,8 +785,7 @@ static int etm4_parse_event_config(struct coresight_device *csdev, .ATTR_CFG_FLD_timestamp_CFG = U64_MAX, }; struct perf_event_attr *attr = &event->attr; - unsigned long cfg_hash; - int preset, cc_threshold; + int cc_threshold; u8 ts_level; /* Clear configuration from previous run */ @@ -872,16 +871,6 @@ static int etm4_parse_event_config(struct coresight_device *csdev, /* bit[12], Return stack enable bit */ config->cfg |= TRCCONFIGR_RS; - /* - * Set any selected configuration and preset. A zero configid means no - * configuration active, preset = 0 means no preset selected. - */ - cfg_hash = ATTR_CFG_GET_FLD(attr, configid); - if (cfg_hash) { - preset = ATTR_CFG_GET_FLD(attr, preset); - ret = cscfg_csdev_enable_active_config(csdev, cfg_hash, preset); - } - /* branch broadcast - enable if selected and supported */ if (ATTR_CFG_GET_FLD(attr, branch_broadcast)) { if (!drvdata->trcbb) { @@ -905,7 +894,9 @@ static int etm4_enable_perf(struct coresight_device *csdev, struct coresight_path *path) { struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); - int ret; + struct perf_event_attr *attr = &event->attr; + unsigned long cfg_hash; + int ret, preset; if (WARN_ON_ONCE(drvdata->cpu != smp_processor_id())) return -EINVAL; @@ -916,7 +907,19 @@ static int etm4_enable_perf(struct coresight_device *csdev, /* Configure the tracer based on the session's specifics */ ret = etm4_parse_event_config(csdev, event); if (ret) - goto out; + goto err; + + /* + * Set any selected configuration and preset. A zero configid means no + * configuration active, preset = 0 means no preset selected. + */ + cfg_hash = ATTR_CFG_GET_FLD(attr, configid); + if (cfg_hash) { + preset = ATTR_CFG_GET_FLD(attr, preset); + ret = cscfg_csdev_enable_active_config(csdev, cfg_hash, preset); + if (ret) + goto err; + } drvdata->trcid = path->trace_id; @@ -925,16 +928,19 @@ static int etm4_enable_perf(struct coresight_device *csdev, /* And enable it */ ret = etm4_enable_hw(drvdata); - -out: - /* Failed to start tracer; roll back to DISABLED mode */ if (ret) { - coresight_set_mode(csdev, CS_MODE_DISABLED); - return ret; + if (cfg_hash) + cscfg_csdev_disable_active_config(csdev); + goto err; } csdev->path = path; return 0; + +err: + /* Failed to start tracer; roll back to DISABLED mode */ + coresight_set_mode(csdev, CS_MODE_DISABLED); + return ret; } static int etm4_enable_sysfs(struct coresight_device *csdev, struct coresight_path *path) -- LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}