From nobody Tue Feb 10 23:53:40 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 56685C76196 for ; Mon, 3 Apr 2023 08:15:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231367AbjDCIPp (ORCPT ); Mon, 3 Apr 2023 04:15:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230157AbjDCIPl (ORCPT ); Mon, 3 Apr 2023 04:15:41 -0400 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D3EA49F3 for ; Mon, 3 Apr 2023 01:15:39 -0700 (PDT) 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 Content-Transfer-Encoding: quoted-printable 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" "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/hi= silicon/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 *p= dev) if (!name) return -ENOMEM; =20 - hisi_pmu_init(cpa_pmu, name, THIS_MODULE); + hisi_pmu_init(cpa_pmu, THIS_MODULE); =20 /* 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/h= isilicon/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); =20 - hisi_pmu_init(ddrc_pmu, name, THIS_MODULE); + hisi_pmu_init(ddrc_pmu, THIS_MODULE); =20 ret =3D perf_pmu_register(&ddrc_pmu->pmu, name, -1); if (ret) { diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hi= silicon/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 *p= dev) =20 name =3D 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); =20 ret =3D perf_pmu_register(&hha_pmu->pmu, name, -1); if (ret) { diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hi= silicon/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 *p= dev) */ name =3D 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); =20 ret =3D perf_pmu_register(&l3c_pmu->pmu, name, -1); if (ret) { diff --git a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c b/drivers/perf/his= ilicon/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 *pd= ev) return ret; } =20 - hisi_pmu_init(pa_pmu, name, THIS_MODULE); + hisi_pmu_init(pa_pmu, THIS_MODULE); ret =3D perf_pmu_register(&pa_pmu->pmu, name, -1); if (ret) { dev_err(pa_pmu->dev, "PMU register failed, ret =3D %d\n", ret); diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisili= con/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, str= uct hlist_node *node) } EXPORT_SYMBOL_GPL(hisi_uncore_pmu_offline_cpu); =20 -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 =3D &hisi_pmu->pmu; =20 - pmu->name =3D name; pmu->module =3D module; pmu->task_ctx_nr =3D perf_invalid_context; pmu->event_init =3D hisi_uncore_pmu_event_init; diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisili= con/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 dev= ice *dev, int hisi_uncore_pmu_init_irq(struct hisi_pmu *hisi_pmu, struct platform_device *pdev); =20 -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/h= isilicon/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; } =20 - hisi_pmu_init(sllc_pmu, name, THIS_MODULE); + hisi_pmu_init(sllc_pmu, THIS_MODULE); =20 ret =3D perf_pmu_register(&sllc_pmu->pmu, name, -1); if (ret) { --=20 2.33.0 From nobody Tue Feb 10 23:53:40 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 31490C761A6 for ; Mon, 3 Apr 2023 08:15:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231502AbjDCIPr (ORCPT ); Mon, 3 Apr 2023 04:15:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37014 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230414AbjDCIPm (ORCPT ); Mon, 3 Apr 2023 04:15:42 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C00155A1 for ; Mon, 3 Apr 2023 01:15:40 -0700 (PDT) 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 Content-Transfer-Encoding: quoted-printable 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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/h= isilicon/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; =20 - ret =3D 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 >=3D HISI_PMU_V2) name =3D 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); =20 + if (!name) + return -ENOMEM; + + ret =3D 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); =20 ret =3D perf_pmu_register(&ddrc_pmu->pmu, name, -1); diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hi= silicon/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; =20 + name =3D devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_hha%u", + hha_pmu->sccl_id, hha_pmu->index_id); + if (!name) + return -ENOMEM; + ret =3D 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 *p= dev) return ret; } =20 - name =3D 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); =20 ret =3D perf_pmu_register(&hha_pmu->pmu, name, -1); diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hi= silicon/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; =20 + name =3D devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_l3c%u", + l3c_pmu->sccl_id, l3c_pmu->ccl_id); + if (!name) + return -ENOMEM; + ret =3D 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; } =20 - /* - * CCL_ID is used to identify the L3C in the same SCCL which was - * used _UID by mistake. - */ - name =3D 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); =20 ret =3D perf_pmu_register(&l3c_pmu->pmu, name, -1); --=20 2.33.0