linux-kernel - Re: [PATCH] libnvdimm, bus: check id immediately following ida_simple

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Date:   Fri, 3 Aug 2018 17:13:39 +0000
From:   "Verma, Vishal L" <vishal.l.verma@...el.com>
To:     "Williams, Dan J" <dan.j.williams@...el.com>,
        "ross.zwisler@...ux.intel.com" <ross.zwisler@...ux.intel.com>,
        "oceanhehy@...il.com" <oceanhehy@...il.com>,
        "Jiang, Dave" <dave.jiang@...el.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        "hehy1@...ovo.com" <hehy1@...ovo.com>
Subject: Re: [PATCH] libnvdimm, bus: check id immediately following
 ida_simple_get


On Fri, 2018-08-03 at 08:08 -0400, Ocean He wrote:
> From: Ocean He <hehy1@...ovo.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@...ovo.com>
> ---
>  drivers/nvdimm/bus.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Looks good, feel free to add
Reviewed-by: Vishal Verma <vishal.l.verma@...el.com>

> 
> 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;