linux-kernel - Re: [PATCH RFC 3/3] drm/exynos: use pending

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Message-ID: <20140418124652.GE24070@n2100.arm.linux.org.uk>
Date:	Fri, 18 Apr 2014 13:46:52 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Andrzej Hajda <a.hajda@...sung.com>
Cc:	dri-devel@...ts.freedesktop.org,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Inki Dae <inki.dae@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	"moderated list:ARM/S5P EXYNOS AR..." 
	<linux-samsung-soc@...r.kernel.org>,
	Tomasz Figa <t.figa@...sung.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	David Airlie <airlied@...ux.ie>,
	open list <linux-kernel@...r.kernel.org>,
	"moderated list:ARM/S5P EXYNOS AR..." 
	<linux-arm-kernel@...ts.infradead.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH RFC 3/3] drm/exynos: use pending_components for
	components tracking

On Fri, Apr 18, 2014 at 02:02:37PM +0200, Andrzej Hajda wrote:
> Separation of the interfaces exposed by the device from the device itself
> seems to me a good thing. I would even consider it as a biggest
> advantage of this solution :)
> 
> The problem of re-initialization does not seems to be relevant here, it
> is classic
> problem of coding correctness nothing more, it can appear here and in
> many different
> places.

It may be a problem of coding correctless, but it's also a maintainability
problem too - it makes it _much_ more difficult to ensure that everything
is correct.

> Anyway it seems we have different point of view on the problem, your say
> about devices with two stage initialization. I see it more as devices
> registering interfaces and superdevice using it.

Right, so please make this exynos-specific, because from what I can see it
has no reason to pretend to be generic.  As I've already pointed out, it
can't be used in the general case because it ties sub-components directly
to their main driver, which is absolutely absurd.  Please keep this
absurdness in exynos and don't spread it around.  Thanks.

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