Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH] libnvdimm, bus: check id immediately following
 ida_simple_get
To:     Ocean He <oceanhehy@gmail.com>, dan.j.williams@intel.com,
        ross.zwisler@linux.intel.com, vishal.l.verma@intel.com
Cc:     linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org,
        Ocean He <hehy1@lenovo.com>
References: <1533298113-17495-1-git-send-email-oceanhehy@gmail.com>
From:   Dave Jiang <dave.jiang@intel.com>
Openpgp: preference=signencrypt
Autocrypt: addr=dave.jiang@intel.com; prefer-encrypt=mutual; keydata=
 xsPuBE6TbysRDACKOBHZT4ez/3/idMBVQP+cMIJAWfTTLqbHVYLdHMHh4h6IXWLqWgc9AYTx
 /ajdOrBVGSK9kMuvqRi0iRO1QLOMUAIc2n/44vh/3Fe54QYfgbndeXhHZi7YEwjiTCbpQ336
 pS0rS2qQaA8GzFwu96OslLI05j9Ygaqy73qmuk3wxomIYiu9a97aN3oVv1RyTp6gJK1NWT3J
 On17P1yWUYPvY3KJtpVqnRLkLZeOIiOahgf9+qiYqPhKQI1Ycx4YhbqkNmDG1VqdMtEWREZO
 DpTti6oecydN37MW1Y+YSzWYDVLWfoLUr2tBveGCRLf/U2n+Tm2PlJR0IZq+BhtuIUVcRLQW
 vI+XenR8j3vHVNHs9UXW/FPB8Xb5fwY2bJniZ+B4G67nwelhMNWe7H9IcEaI7Eo32fZk+9fo
 x6GDAhdT0pEetwuhkmI0YYD7cQj1mEx1oEbzX2p/HRW9sHTSv0V2zKbkPvii3qgvCoDb1uLd
 4661UoSG0CYaAx8TwBxUqjsBAO9FXDhLHZJadyHmWp64xQGnNgBathuqoSsIWgQWBpfhDACA
 OYftX52Wp4qc3ZT06NPzGTV35xr4DVftxxUHiwzB/bzARfK8tdoW4A44gN3P03DAu+UqLoqm
 UP/e8gSLEjoaebjMu8c2iuOhk1ayHkDPc2gugTgLLBWPkhvIEV4rUV9C7TsgAAvNNDAe8X00
 Tu1m01A4ToLpYsNWEtM9ZRdKXSo6YS45DFRhel29ZRz24j4ZNIxN9Bee/fn7FrL4HgO01yH+
 QULDAtU87AkVoBdU5xBJVj7tGosuV+ia4UCWXjTzb+ERek2503OvNq4xqche3RMoZLsSHiOj
 5PjMNX4EA6pf5kRWdNutjmAsXrpZrnviWMPy+zHUzHIw/gaI00lHMjS0P99A7ay/9BjtsIBx
 lJZ09Kp6SE0EiZpFIxB5D0ji6rHu3Qblwq+WjM2+1pydVxqt2vt7+IZgEB4Qm6rml835UB89
 TTkMtiIXJ+hMC/hajIuFSah+CDkfagcrt1qiaVoEAs/1cCuAER+h5ClMnLZPPxNxphsqkXxn
 3MVJcMEL/iaMimP3oDXJoK3O+u3gC3p55A/LYZJ7hP9lHTT4MtgwmgBp9xPeVFWx3rwQOKix
 SPONHlkjfvn4dUHmaOmJyKgtt5htpox+XhBkuCZ5UWpQ40/GyVypWyBXtqNx/0IKByXy4QVm
 QjUL/U2DchYhW+2w8rghIhkuHX2YOdldyEvXkzN8ysGR31TDwshg600k4Q/UF/MouC2ZNeMa
 y8I0whHBFTwSjN5T1F9cvko4PsHNB3QH4M4tbArwn4RzSX6Hfxoq59ziyI4Et6sE5SyiVEZQ
 DhKZ8VU61uUaYHDdid8xKU4sV5IFCERIoIwieEAkITNvCdFtuXl9gugzld7IHbOTRaGy4M+M
 gOyAvSe5ysBrXhY+B0d+EYif1I8s4PbnkH2xehof++lQuy3+1TZcweSx1f/uF6d92ZDkvJzQ
 QbkicMLaPy0IS5XIMkkpD1zIO0jeaHcTm3uzB9k8N9y4tA2ELWVR/iFZigrtrwpIJtJLUieB
 89EOJLR6xbksSrFhQ80oRGF2ZSBKaWFuZyAoV29yaykgPGRhdmUuamlhbmdAaW50ZWwuY29t
 PsJ9BBMRCAAlAhsjBgsJCAcDAgYVCAIJCgsEFgIDAQIeAQIXgAUCUZEwDwIZAQAKCRBkFcTx
 ZqO5Ps8HAP4kF/KAor80fNwT7osSHGG5rLFPR/Yc5V0QpqkU8DhZDgEAoStRa/a6Mtq3Ri1H
 B84kFIqSQ9ME5049k6k1K7wdXcvOwE0ETpNvKxAEANGHLx0q/R99wzbVdnRthIZttNQ6M4R8
 AAtEypE9JG3PLrEd9MUB5wf0fB/2Jypec3x935mRW3Zt1i+TrzjQDzMV5RyTtpWI7PwIh5IZ
 0h4OV2yQHFVViHi6lubCRypQYiMzTmEKua3LeBGvUR9vVmpPJZ/UP6VajKqywjPHYBwLAAMF
 A/9B/PdGc1sZHno0ezuwZO2J9BOsvASNUzamO9to5P9VHTA6UqRvyfXJpNxLF1HjT4ax7Xn4
 wGr6V1DCG3JYBmwIZjfinrLINKEK43L+sLbVVi8Mypc32HhNx/cPewROY2vPb4U7y3jhPBtt
 lt0ZMb75Lh7zY3TnGLOx1AEzmqwZSMJhBBgRCAAJBQJOk28rAhsMAAoJEGQVxPFmo7k+qiUB
 AKH0QWC+BBBn3pa9tzOz5hTrup+GIzf5TcuCsiAjISEqAPkBTGk5iiGrrHkxsz8VulDVpNxk
 o6nmKbYpUAltQObU2w==
Message-ID: <6c505c3e-1c2d-a74b-1018-f8abe5175f13@intel.com>
Date:   Tue, 7 Aug 2018 15:46:09 -0700
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.9.1
MIME-Version: 1.0
In-Reply-To: <1533298113-17495-1-git-send-email-oceanhehy@gmail.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


On 08/03/2018 05:08 AM, Ocean He wrote:
> From: Ocean He <hehy1@lenovo.com>
> 
> The id check was not executed immediately following ida_simple_get. Just
> change the codes position, without function change.
> 
> Signed-off-by: Ocean He <hehy1@lenovo.com>

Applied.

> ---
>  drivers/nvdimm/bus.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
> index 27902a8..ab28e7c 100644
> --- a/drivers/nvdimm/bus.c
> +++ b/drivers/nvdimm/bus.c
> @@ -350,12 +350,12 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
>  	INIT_LIST_HEAD(&nvdimm_bus->mapping_list);
>  	init_waitqueue_head(&nvdimm_bus->probe_wait);
>  	nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL);
> -	mutex_init(&nvdimm_bus->reconfig_mutex);
> -	badrange_init(&nvdimm_bus->badrange);
>  	if (nvdimm_bus->id < 0) {
>  		kfree(nvdimm_bus);
>  		return NULL;
>  	}
> +	mutex_init(&nvdimm_bus->reconfig_mutex);
> +	badrange_init(&nvdimm_bus->badrange);
>  	nvdimm_bus->nd_desc = nd_desc;
>  	nvdimm_bus->dev.parent = parent;
>  	nvdimm_bus->dev.release = nvdimm_bus_release;
>