linux-kernel - Re: [PATCH] USB: input: gtco.c: fix usb

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Date:	Mon, 27 Jan 2014 10:31:36 +0400
From:	Alexey Khoroshilov <khoroshilov@...ras.ru>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	ldv-project@...uxtesting.org
Subject: Re: [PATCH] USB: input: gtco.c: fix usb_dev leak

On 21.01.2014 23:59, Dmitry Torokhov wrote:
> On Sun, Jan 19, 2014 at 03:24:26AM +0400, Alexey Khoroshilov wrote:
>> There is usb_get_dev() in gtco_probe(), but there is no usb_put_dev()
>> anywhere in the driver.
>>
>> The patch adds usb_get_dev() to failure handling code of gtco_probe()
>> and to gtco_disconnect(().
> Hmm, I think gtco should simply not use usb_get_dev() in the first
> place.
>
> Thanks.
Dear Dmitry,

Could you please clarify why usb_get_dev() not needed here?
We store reference to usb_dev in gtco structure, so we should refcount it.
What is wrong in this reasoning?

Thanks,
Alexey
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