From patchwork Wed Aug 19 02:05:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen (ThunderTown)" X-Patchwork-Id: 11722363 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5B738138C for ; Wed, 19 Aug 2020 02:05:53 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 448A42067C for ; Wed, 19 Aug 2020 02:05:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 448A42067C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 73ADE134CA7FC; Tue, 18 Aug 2020 19:05:51 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=45.249.212.32; helo=huawei.com; envelope-from=thunder.leizhen@huawei.com; receiver= Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 9D5BE134CA7F3 for ; Tue, 18 Aug 2020 19:05:47 -0700 (PDT) Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id A5B98752E57501560590; Wed, 19 Aug 2020 10:05:44 +0800 (CST) Received: from DESKTOP-C3MD9UG.china.huawei.com (10.174.177.253) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.487.0; Wed, 19 Aug 2020 10:05:33 +0800 From: Zhen Lei To: Oliver O'Halloran , Dan Williams , Vishal Verma , "Dave Jiang" , Ira Weiny , Markus Elfring , linux-nvdimm , linux-kernel Subject: [PATCH v2 1/4] libnvdimm: fix memmory leaks in of_pmem.c Date: Wed, 19 Aug 2020 10:05:00 +0800 Message-ID: <20200819020503.3079-2-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20200819020503.3079-1-thunder.leizhen@huawei.com> References: <20200819020503.3079-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.177.253] X-CFilter-Loop: Reflected Message-ID-Hash: WLVF4XEPIQSOWZYXFURWAQ2BQG4YTCD3 X-Message-ID-Hash: WLVF4XEPIQSOWZYXFURWAQ2BQG4YTCD3 X-MailFrom: thunder.leizhen@huawei.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Zhen Lei X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: The memory priv->bus_desc.provider_name allocated by kstrdup() is not freed correctly. Fixes: 49bddc73d15c ("libnvdimm/of_pmem: Provide a unique name for bus provider") Signed-off-by: Zhen Lei Reviewed-by: Oliver O'Halloran --- drivers/nvdimm/of_pmem.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c index 10dbdcdfb9ce913..1292ffca7b2ecc0 100644 --- a/drivers/nvdimm/of_pmem.c +++ b/drivers/nvdimm/of_pmem.c @@ -36,6 +36,7 @@ static int of_pmem_region_probe(struct platform_device *pdev) priv->bus = bus = nvdimm_bus_register(&pdev->dev, &priv->bus_desc); if (!bus) { + kfree(priv->bus_desc.provider_name); kfree(priv); return -ENODEV; } @@ -83,6 +84,7 @@ static int of_pmem_region_remove(struct platform_device *pdev) struct of_pmem_private *priv = platform_get_drvdata(pdev); nvdimm_bus_unregister(priv->bus); + kfree(priv->bus_desc.provider_name); kfree(priv); return 0; From patchwork Wed Aug 19 02:05:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen (ThunderTown)" X-Patchwork-Id: 11722361 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 416A617CA for ; Wed, 19 Aug 2020 02:05:52 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2A9272067C for ; Wed, 19 Aug 2020 02:05:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2A9272067C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 5CD82134CA7F7; Tue, 18 Aug 2020 19:05:51 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=45.249.212.32; helo=huawei.com; envelope-from=thunder.leizhen@huawei.com; receiver= Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 9C75B134CA7F2 for ; Tue, 18 Aug 2020 19:05:47 -0700 (PDT) Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id A92CA3F694DDC345A29A; Wed, 19 Aug 2020 10:05:44 +0800 (CST) Received: from DESKTOP-C3MD9UG.china.huawei.com (10.174.177.253) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.487.0; Wed, 19 Aug 2020 10:05:33 +0800 From: Zhen Lei To: Oliver O'Halloran , Dan Williams , Vishal Verma , "Dave Jiang" , Ira Weiny , Markus Elfring , linux-nvdimm , linux-kernel Subject: [PATCH v2 2/4] libnvdimm: add sanity check for provider_name in of_pmem_region_probe() Date: Wed, 19 Aug 2020 10:05:01 +0800 Message-ID: <20200819020503.3079-3-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20200819020503.3079-1-thunder.leizhen@huawei.com> References: <20200819020503.3079-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.177.253] X-CFilter-Loop: Reflected Message-ID-Hash: GHRTMOW7ZFMR32YGNVYB32WEPPH6QN4P X-Message-ID-Hash: GHRTMOW7ZFMR32YGNVYB32WEPPH6QN4P X-MailFrom: thunder.leizhen@huawei.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Zhen Lei X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: kstrdup() may return NULL because of no memory, check it. Fixes: 49bddc73d15c ("libnvdimm/of_pmem: Provide a unique name for bus provider") Signed-off-by: Zhen Lei --- drivers/nvdimm/of_pmem.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c index 1292ffca7b2ecc0..13c4c274ca6ea88 100644 --- a/drivers/nvdimm/of_pmem.c +++ b/drivers/nvdimm/of_pmem.c @@ -31,6 +31,11 @@ static int of_pmem_region_probe(struct platform_device *pdev) return -ENOMEM; priv->bus_desc.provider_name = kstrdup(pdev->name, GFP_KERNEL); + if (!priv->bus_desc.provider_name) { + kfree(priv); + return -ENOMEM; + } + priv->bus_desc.module = THIS_MODULE; priv->bus_desc.of_node = np; From patchwork Wed Aug 19 02:05:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen (ThunderTown)" X-Patchwork-Id: 11722355 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5D54C138C for ; Wed, 19 Aug 2020 02:05:50 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 45CE02075E for ; Wed, 19 Aug 2020 02:05:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 45CE02075E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 126DA134CA7F2; Tue, 18 Aug 2020 19:05:50 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=45.249.212.32; helo=huawei.com; envelope-from=thunder.leizhen@huawei.com; receiver= Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 9AAE313093FC5 for ; Tue, 18 Aug 2020 19:05:47 -0700 (PDT) Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id A1E71CAB0D9349564C39; Wed, 19 Aug 2020 10:05:44 +0800 (CST) Received: from DESKTOP-C3MD9UG.china.huawei.com (10.174.177.253) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.487.0; Wed, 19 Aug 2020 10:05:34 +0800 From: Zhen Lei To: Oliver O'Halloran , Dan Williams , Vishal Verma , "Dave Jiang" , Ira Weiny , Markus Elfring , linux-nvdimm , linux-kernel Subject: [PATCH v2 3/4] libnvdimm/bus: simplify walk_to_nvdimm_bus() Date: Wed, 19 Aug 2020 10:05:02 +0800 Message-ID: <20200819020503.3079-4-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20200819020503.3079-1-thunder.leizhen@huawei.com> References: <20200819020503.3079-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.177.253] X-CFilter-Loop: Reflected Message-ID-Hash: YQT4QE6TDC6PEJOUYFGQ76L6524OH4OM X-Message-ID-Hash: YQT4QE6TDC6PEJOUYFGQ76L6524OH4OM X-MailFrom: thunder.leizhen@huawei.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Zhen Lei X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: I first want to move dev_WARN_ONCE() after "if (dev)" branch, but further I find the "if (dev)" can only be true when is_nvdimm_bus(dev) successed. No functional change. In fact, the compiler can optimize it correctly. I run "size drivers/nvdimm/bus.o" and find nothing has changed. So it's just source code level optimization, make us can read it faster. Signed-off-by: Zhen Lei --- drivers/nvdimm/bus.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 955265656b96c73..1d89114cb6ab93e 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -316,10 +316,9 @@ struct nvdimm_bus *walk_to_nvdimm_bus(struct device *nd_dev) for (dev = nd_dev; dev; dev = dev->parent) if (is_nvdimm_bus(dev)) - break; - dev_WARN_ONCE(nd_dev, !dev, "invalid dev, not on nd bus\n"); - if (dev) - return to_nvdimm_bus(dev); + return to_nvdimm_bus(dev); + + dev_WARN_ONCE(nd_dev, 1, "invalid dev, not on nd bus\n"); return NULL; } From patchwork Wed Aug 19 02:05:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen (ThunderTown)" X-Patchwork-Id: 11722365 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AF6B4138C for ; Wed, 19 Aug 2020 02:05:54 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 988AD2067C for ; Wed, 19 Aug 2020 02:05:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 988AD2067C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 89554134CA7FF; Tue, 18 Aug 2020 19:05:52 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=45.249.212.190; helo=huawei.com; envelope-from=thunder.leizhen@huawei.com; receiver= Received: from huawei.com (szxga04-in.huawei.com [45.249.212.190]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id F1C7F13093FC5 for ; Tue, 18 Aug 2020 19:05:47 -0700 (PDT) Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id A6539BF6B7B2A3CC8183; Wed, 19 Aug 2020 10:05:45 +0800 (CST) Received: from DESKTOP-C3MD9UG.china.huawei.com (10.174.177.253) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.487.0; Wed, 19 Aug 2020 10:05:35 +0800 From: Zhen Lei To: Oliver O'Halloran , Dan Williams , Vishal Verma , "Dave Jiang" , Ira Weiny , Markus Elfring , linux-nvdimm , linux-kernel Subject: [PATCH v2 4/4] libnvdimm/region: reduce an unnecessary if branch in nd_region_create() Date: Wed, 19 Aug 2020 10:05:03 +0800 Message-ID: <20200819020503.3079-5-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20200819020503.3079-1-thunder.leizhen@huawei.com> References: <20200819020503.3079-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.177.253] X-CFilter-Loop: Reflected Message-ID-Hash: 5XTRYI6GGFSJRWWGCRSBSDY52GGR7SDY X-Message-ID-Hash: 5XTRYI6GGFSJRWWGCRSBSDY52GGR7SDY X-MailFrom: thunder.leizhen@huawei.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Zhen Lei X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: The "else" branch can only be entered when ndr_desc->flush is NULL. After replaced "NULL" with "ndr_desc->flush", we will find that the statements in "if..else.." are the same. No functional change. Signed-off-by: Zhen Lei --- drivers/nvdimm/region_devs.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index ef23119db574663..7cf9c7d857909ce 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -1131,10 +1131,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, nd_region->ndr_size = resource_size(ndr_desc->res); nd_region->ndr_start = ndr_desc->res->start; nd_region->align = default_align(nd_region); - if (ndr_desc->flush) - nd_region->flush = ndr_desc->flush; - else - nd_region->flush = NULL; + nd_region->flush = ndr_desc->flush; nd_device_register(dev);