linux-kernel - Re: [RFC PATCH 0/2] managed token devres interfaces

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Date:	Thu, 10 Apr 2014 08:32:22 -0600
From:	Shuah Khan <shuah.kh@...sung.com>
To:	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
Cc:	Greg KH <gregkh@...uxfoundation.org>, tj@...nel.org,
	rafael.j.wysocki@...el.com, linux@...ck-us.net, toshi.kani@...com,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	shuahkhan@...il.com, Shuah Khan <shuah.kh@...sung.com>
Subject: Re: [RFC PATCH 0/2] managed token devres interfaces

On 04/10/2014 05:38 AM, Mauro Carvalho Chehab wrote:
> Hi Alan,
>
> Em Thu, 10 Apr 2014 12:04:35 +0100
> One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk> escreveu:
>
>>>>>    - Construct string with (dev is struct em28xx *dev)
>>>>> 		format: "tuner:%s-%s-%d"
>>>>> 		with the following:
>>>>>      	            dev_name(&dev->udev->dev)
>>>>>                   dev->udev->bus->bus_name
>>>>>                   dev->tuner_addr
>>
>> What guarantees this won't get confused by hot plugging and re-use of the
>> bus slot ?
>
> Good point. Yes, this should be addressed.
>

This resource should be destroyed when em28xx_ handles unplug from its 
em28xx_usb_disconnect() or in generic words, in its "uninit". It is a 
matter of making sure this resource is handled in the "uninit" for this 
media device/driver(s) like any other shared resource.

Would that cover the hot plugging and re-use of the bus slot scenario?

-- Shuah


-- 
Shuah Khan
Senior Linux Kernel Developer - Open Source Group
Samsung Research America(Silicon Valley)
shuah.kh@...sung.com | (970) 672-0658
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