linux-kernel - Re: kdbus: add code for buses, domains and endpoints

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Message-ID: <54535C8F.30707@zonque.org>
Date:	Fri, 31 Oct 2014 10:55:27 +0100
From:	Daniel Mack <daniel@...que.org>
To:	Al Viro <viro@...IV.linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
	john.stultz@...aro.org, arnd@...db.de, tj@...nel.org,
	marcel@...tmann.org, desrt@...rt.ca, hadess@...ess.net,
	dh.herrmann@...il.com, tixxdz@...ndz.org,
	simon.mcvittie@...labora.co.uk, alban.crequy@...labora.co.uk,
	javier.martinez@...labora.co.uk, teg@...m.no
Subject: Re: kdbus: add code for buses, domains and endpoints

Hi,

On 10/31/2014 02:39 AM, Al Viro wrote:
> On Wed, Oct 29, 2014 at 03:00:52PM -0700, Greg Kroah-Hartman wrote:
>> See Documentation/kdbus.txt for more details.
> 
> ... which has nothing whatsoever on object lifetime rules.

True. That document only describes the external API exposed by the
driver towards userspace.

> Could you
> folks please document that somewhere?  What pins what, what state
> transitions are possible, etc.

Hmm, I'll see whether I can write something up.

> BTW, the calling conventions for your foo_new() are annoying - instead of
> "return -E... or 0, storing the reference to new object in var parameter
> passed as the last argument", could you please just return ERR_PTR(-E...)
> on error, a pointer to new object on success and to hell with those
> struct foo **foo in the argument lists?

No problem at all. We'll change that around.


Thanks for your feedback, much appreciated!

Daniel

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