From patchwork Mon Apr 3 08:14:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Junhao He X-Patchwork-Id: 13197793 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 7E54BC77B62 for ; Mon, 3 Apr 2023 08:16:45 +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=bLC1YVCE7qgv/h1FWlmZGZmQa2axjzSKMO2Nnx0xDME=; b=zB1r2ROU/5rsg0 m9MkhOFBtu+JCpU0e14bqVNzC/C74jFms7W0dmBDZOcwfASClzqV6bXtx4h5tnnxVOz8EdbV1laiK pS7PmoTJngbfo7F/lh+9uX3F9D2T5J0RgJ1f/Iws9qLrtjKNOQ55TFsCDTUnF+J3GtEfBxauVqRU/ nnKaPhNPjN18JBC3FF8thjy/m0l5tWLdpI0OmNcXxz4EPHUAoP/ntcC7QqhY5r/dtnvqLBPlbi+MP 8387UcJT1ZOpMr3qDKrmAVf5513MFItk27yYGvExsxtGfGf4t822mPNzwRki/3CWHfDXfe2JQFpmH KVS+7T4r/6EYh2D+Uu7g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pjFM3-00EUf3-1l; Mon, 03 Apr 2023 08:15:55 +0000 Received: from szxga03-in.huawei.com ([45.249.212.189]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pjFLw-00EUZ0-3A for linux-arm-kernel@lists.infradead.org; Mon, 03 Apr 2023 08:15:52 +0000 Received: from dggpeml500002.china.huawei.com (unknown [172.30.72.53]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4PqkGH43VHzKr9M; Mon, 3 Apr 2023 16:15:03 +0800 (CST) Received: from localhost.localdomain (10.69.192.56) by dggpeml500002.china.huawei.com (7.185.36.158) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Mon, 3 Apr 2023 16:15:37 +0800 From: Junhao He To: , , , CC: , , , , , , , , Subject: [PATCH 1/2] drivers/perf: hisi: Remove redundant initialized of pmu->name Date: Mon, 3 Apr 2023 16:14:22 +0800 Message-ID: <20230403081423.62460-2-hejunhao3@huawei.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20230403081423.62460-1-hejunhao3@huawei.com> References: <20230403081423.62460-1-hejunhao3@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpeml500002.china.huawei.com (7.185.36.158) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230403_011549_347592_EE028A2A X-CRM114-Status: GOOD ( 11.80 ) 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 "pmu->name" is initialized by perf_pmu_register() function, so remove the redundant initialized in hisi_pmu_init(). Signed-off-by: Junhao He Reviewed-by: Jonathan Cameron --- drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c | 2 +- drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 2 +- drivers/perf/hisilicon/hisi_uncore_hha_pmu.c | 2 +- drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c | 2 +- drivers/perf/hisilicon/hisi_uncore_pa_pmu.c | 2 +- drivers/perf/hisilicon/hisi_uncore_pmu.c | 4 +--- drivers/perf/hisilicon/hisi_uncore_pmu.h | 3 +-- drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c | 2 +- 8 files changed, 8 insertions(+), 11 deletions(-) diff --git a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c index 4c67d57217a7..40f1bc9f9b91 100644 --- a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c @@ -316,7 +316,7 @@ static int hisi_cpa_pmu_probe(struct platform_device *pdev) if (!name) return -ENOMEM; - hisi_pmu_init(cpa_pmu, name, THIS_MODULE); + hisi_pmu_init(cpa_pmu, THIS_MODULE); /* Power Management should be disabled before using CPA PMU. */ hisi_cpa_pmu_disable_pm(cpa_pmu); diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c index 8c3ffcbfd4c0..8a3d74ddcd6d 100644 --- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c @@ -516,7 +516,7 @@ static int hisi_ddrc_pmu_probe(struct platform_device *pdev) "hisi_sccl%u_ddrc%u", ddrc_pmu->sccl_id, ddrc_pmu->index_id); - hisi_pmu_init(ddrc_pmu, name, THIS_MODULE); + hisi_pmu_init(ddrc_pmu, THIS_MODULE); ret = perf_pmu_register(&ddrc_pmu->pmu, name, -1); if (ret) { diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c index 806698b9eabf..5701a84edb0e 100644 --- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c @@ -519,7 +519,7 @@ static int hisi_hha_pmu_probe(struct platform_device *pdev) name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_hha%u", hha_pmu->sccl_id, hha_pmu->index_id); - hisi_pmu_init(hha_pmu, name, THIS_MODULE); + hisi_pmu_init(hha_pmu, THIS_MODULE); ret = perf_pmu_register(&hha_pmu->pmu, name, -1); if (ret) { diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c index 5b2c35f1658a..68596b566344 100644 --- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c @@ -557,7 +557,7 @@ static int hisi_l3c_pmu_probe(struct platform_device *pdev) */ name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_l3c%u", l3c_pmu->sccl_id, l3c_pmu->ccl_id); - hisi_pmu_init(l3c_pmu, name, THIS_MODULE); + hisi_pmu_init(l3c_pmu, THIS_MODULE); ret = perf_pmu_register(&l3c_pmu->pmu, name, -1); if (ret) { diff --git a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c index afe3419f3f6d..71b6687d6696 100644 --- a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c @@ -412,7 +412,7 @@ static int hisi_pa_pmu_probe(struct platform_device *pdev) return ret; } - hisi_pmu_init(pa_pmu, name, THIS_MODULE); + hisi_pmu_init(pa_pmu, THIS_MODULE); ret = perf_pmu_register(&pa_pmu->pmu, name, -1); if (ret) { dev_err(pa_pmu->dev, "PMU register failed, ret = %d\n", ret); diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c index f1b0f5e1a28f..2823f381930d 100644 --- a/drivers/perf/hisilicon/hisi_uncore_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c @@ -531,12 +531,10 @@ int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node) } EXPORT_SYMBOL_GPL(hisi_uncore_pmu_offline_cpu); -void hisi_pmu_init(struct hisi_pmu *hisi_pmu, const char *name, - struct module *module) +void hisi_pmu_init(struct hisi_pmu *hisi_pmu, struct module *module) { struct pmu *pmu = &hisi_pmu->pmu; - pmu->name = name; pmu->module = module; pmu->task_ctx_nr = perf_invalid_context; pmu->event_init = hisi_uncore_pmu_event_init; diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h index f8e3cc6903d7..07890a8e96ca 100644 --- a/drivers/perf/hisilicon/hisi_uncore_pmu.h +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h @@ -121,6 +121,5 @@ ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev, int hisi_uncore_pmu_init_irq(struct hisi_pmu *hisi_pmu, struct platform_device *pdev); -void hisi_pmu_init(struct hisi_pmu *hisi_pmu, const char *name, - struct module *module); +void hisi_pmu_init(struct hisi_pmu *hisi_pmu, struct module *module); #endif /* __HISI_UNCORE_PMU_H__ */ diff --git a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c index 1e354433776a..6fe534a665ed 100644 --- a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c @@ -445,7 +445,7 @@ static int hisi_sllc_pmu_probe(struct platform_device *pdev) return ret; } - hisi_pmu_init(sllc_pmu, name, THIS_MODULE); + hisi_pmu_init(sllc_pmu, THIS_MODULE); ret = perf_pmu_register(&sllc_pmu->pmu, name, -1); if (ret) { From patchwork Mon Apr 3 08:14:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Junhao He X-Patchwork-Id: 13197792 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 6DA09C76196 for ; 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Mon, 03 Apr 2023 08:15:53 +0000 Received: from szxga08-in.huawei.com ([45.249.212.255]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pjFLw-00EUZ2-34 for linux-arm-kernel@lists.infradead.org; Mon, 03 Apr 2023 08:15:51 +0000 Received: from dggpeml500002.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4PqkC41LjJz17R1J; Mon, 3 Apr 2023 16:12:16 +0800 (CST) Received: from localhost.localdomain (10.69.192.56) by dggpeml500002.china.huawei.com (7.185.36.158) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Mon, 3 Apr 2023 16:15:38 +0800 From: Junhao He To: , , , CC: , , , , , , , , Subject: [PATCH 2/2] drivers/perf: hisi: add NULL check for name Date: Mon, 3 Apr 2023 16:14:23 +0800 Message-ID: <20230403081423.62460-3-hejunhao3@huawei.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20230403081423.62460-1-hejunhao3@huawei.com> References: <20230403081423.62460-1-hejunhao3@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpeml500002.china.huawei.com (7.185.36.158) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230403_011549_324555_3F881A37 X-CRM114-Status: GOOD ( 14.04 ) 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 When allocations fails that can be NULL now. If the name provided is NULL, then the initialization process of the PMU type and dev will be skipped in function perf_pmu_register(). Consequently, the PMU will not be able to register into the kernel. Moreover, in the case of unregister the PMU, the function device_del() will need to handle NULL pointers, which potentially can cause issues. So move this allocation above the cpuhp_state_add_instance() and directly return if it does fail. Signed-off-by: Junhao He Reviewed-by: Jonathan Cameron --- drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 17 ++++++++++------- drivers/perf/hisilicon/hisi_uncore_hha_pmu.c | 7 +++++-- drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c | 11 +++++------ 3 files changed, 20 insertions(+), 15 deletions(-) diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c index 8a3d74ddcd6d..ffb039d05d07 100644 --- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c @@ -499,13 +499,6 @@ static int hisi_ddrc_pmu_probe(struct platform_device *pdev) if (ret) return ret; - ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE, - &ddrc_pmu->node); - if (ret) { - dev_err(&pdev->dev, "Error %d registering hotplug;\n", ret); - return ret; - } - if (ddrc_pmu->identifier >= HISI_PMU_V2) name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_ddrc%u_%u", @@ -516,6 +509,16 @@ static int hisi_ddrc_pmu_probe(struct platform_device *pdev) "hisi_sccl%u_ddrc%u", ddrc_pmu->sccl_id, ddrc_pmu->index_id); + if (!name) + return -ENOMEM; + + ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE, + &ddrc_pmu->node); + if (ret) { + dev_err(&pdev->dev, "Error %d registering hotplug;\n", ret); + return ret; + } + hisi_pmu_init(ddrc_pmu, THIS_MODULE); ret = perf_pmu_register(&ddrc_pmu->pmu, name, -1); diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c index 5701a84edb0e..15caf99e1eef 100644 --- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c @@ -510,6 +510,11 @@ static int hisi_hha_pmu_probe(struct platform_device *pdev) if (ret) return ret; + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_hha%u", + hha_pmu->sccl_id, hha_pmu->index_id); + if (!name) + return -ENOMEM; + ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE, &hha_pmu->node); if (ret) { @@ -517,8 +522,6 @@ static int hisi_hha_pmu_probe(struct platform_device *pdev) return ret; } - name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_hha%u", - hha_pmu->sccl_id, hha_pmu->index_id); hisi_pmu_init(hha_pmu, THIS_MODULE); ret = perf_pmu_register(&hha_pmu->pmu, name, -1); diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c index 68596b566344..794dbcd19b7a 100644 --- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c @@ -544,6 +544,11 @@ static int hisi_l3c_pmu_probe(struct platform_device *pdev) if (ret) return ret; + name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_l3c%u", + l3c_pmu->sccl_id, l3c_pmu->ccl_id); + if (!name) + return -ENOMEM; + ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE, &l3c_pmu->node); if (ret) { @@ -551,12 +556,6 @@ static int hisi_l3c_pmu_probe(struct platform_device *pdev) return ret; } - /* - * CCL_ID is used to identify the L3C in the same SCCL which was - * used _UID by mistake. - */ - name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_l3c%u", - l3c_pmu->sccl_id, l3c_pmu->ccl_id); hisi_pmu_init(l3c_pmu, THIS_MODULE); ret = perf_pmu_register(&l3c_pmu->pmu, name, -1);