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

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Message-ID: <CAPcyv4h6x3uePr0Srr_nQDeWyO2u1nhZeUE_2jpAePsBFmUdCQ@mail.gmail.com>
Date:	Thu, 24 Mar 2016 08:21:52 -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 8:15 AM, Johannes Thumshirn <jthumshirn@...e.de> wrote:
> On Donnerstag, 24. März 2016 08:14:10 CET Dan Williams wrote:
>> 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);
>> ...
>> };
>
> Ah OK, didn't see this, sorry

No worries.  Thanks for the review!