linux-kernel - Re: [PATCH 0/2] mtd: use put_device() if device

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Message-ID: <4a280604-16f2-776b-d997-d5882af6fe35@gmail.com>
Date:   Mon, 12 Mar 2018 11:21:24 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     Richard Weinberger <richard@....at>
Cc:     dwmw2@...radead.org, computersforpeace@...il.com,
        boris.brezillon@...e-electrons.com, marek.vasut@...il.com,
        cyrille.pitchen@...ev4u.fr, dedekind1@...il.com,
        linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org
Subject: Re: [PATCH 0/2] mtd: use put_device() if device_register fail



On Monday 12 March 2018 01:05 AM, Richard Weinberger wrote:
> Am Freitag, 9. März 2018, 11:50:47 CET schrieb Arvind Yadav:
>> if device_register() returned an error! Always use put_device()
>> to give up the reference initialized.
>>
>> Arvind Yadav (2):
>>    [PATCH 1/2] mtd: use put_device() if device_register fail
>>    [PATCH 2/2] mtd: ubi: use put_device() if device_register fail
> Uhh, this is not obvious. Does device_register() really always return with a
> reference held in all (error) cases?
>
> Thanks,
> //richard
if device_register() returned an error! Always use put_device()
to give up the reference initialized.(-- Please see the comment
for device_register() ). put_device() is able to handle those case
where it'll not return a reference.

~arvind