linux-kernel - Re: [PATCH 05/13] libnvdimm, blk: use devm_add

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Date:	Thu, 24 Mar 2016 08:14:10 -0700
From:	Dan Williams <dan.j.williams@...el.com>
To:	Johannes Thumshirn <jthumshirn@...e.de>
Cc:	"linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/13] libnvdimm, blk: use devm_add_action to release bdev resources

On Thu, Mar 24, 2016 at 4:48 AM, Johannes Thumshirn <jthumshirn@...e.de> wrote:
> On Mittwoch, 23. März 2016 18:25:47 CET Dan Williams wrote:
>> Register a callback to clean up the request_queue and put the gendisk at
>> driver disable time.
>>
>> Cc: Ross Zwisler <ross.zwisler@...ux.intel.com>
>> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
>
> [...]
>
>>
>>  static int nd_blk_remove(struct device *dev)
>>  {
>> -     struct nd_blk_device *blk_dev = dev_get_drvdata(dev);
>> -
>>       if (is_nd_btt(dev))
>>               nvdimm_namespace_detach_btt(to_nd_btt(dev));
>> -     else
>> -             nd_blk_detach_disk(blk_dev);
>> -     kfree(blk_dev);
>> -
>>       return 0;
>>  }
>>
>
> Can't this be void?
>

That's not how the core defines this:

struct device_driver {
...
        int (*remove) (struct device *dev);
...
};