linux-kernel - Re: [linux-pm] [PATCH 0/8] Suspend block api (version 6)

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Date:	Fri, 14 May 2010 14:40:56 -0700
From:	Kevin Hilman <khilman@...prootsystems.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Tony Lindgren <tony@...mide.com>, Matthew Garrett <mjg@...hat.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Paul Walmsley <paul@...an.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	"Linux-pm mailing list" <linux-pm@...ts.linux-foundation.org>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>, Oleg Nesterov <oleg@...hat.com>,
	magnus.damm@...il.com, "Theodore Ts'o" <tytso@....edu>,
	mark gross <mgross@...ux.intel.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Geoff Smith <geoffx.smith@...el.com>,
	Brian Swetland <swetland@...gle.com>,
	Benoît Cousson <b-cousson@...com>,
	linux-omap@...r.kernel.org, Vitaly Wool <vitalywool@...il.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...mlogic.co.uk>
Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 6)

Kevin Hilman <khilman@...prootsystems.com> writes:

> "Rafael J. Wysocki" <rjw@...k.pl> writes:
>
>> On Thursday 13 May 2010, Tony Lindgren wrote:
>>> * Rafael J. Wysocki <rjw@...k.pl> [100513 14:16]:
>
> [...]
>
>>>  
>>> > It solves a practical issue that _at_ _the_ _moment_ cannot be solved
>>> > differently, while there's a growing number of out-of-tree drivers depending
>>> > on this framework.  We need those drivers in and because we don't have any
>>> > viable alternative at hand, we have no good reason to reject it.
>>> 
>>> Nothing is preventing merging the drivers can be merged without
>>> these calls.
>>
>> And yet, there _is_ a growing nuber of drivers that don't get merge because
>> of that.  That's _reality_.  Are you going to discuss with facts, or what?
>
> It may be reality, but IMO, "preventing other drivers" isn't a good
> *technical* argument for merging a feature.  It feels like these "for
> the 'good' of the community" arguments are being used to trump the
> technical arguments.  Maybe we need to keep the separate.

To continue along the "for the good of the community" path...

If it truly is the lack of a suspend blocker API that is preventing
the merge of these out of tree drivers, I second Mark's proposal[1] to
merge a noop version of the API while the technical issues continue to
be discussed.  Then we would see how many drivers get submitted and
merged.

Personally, I suspect that lack of this feature is not the real
obstacle to getting these out-of-tree drivers upstream.  Having this
API upstream will not change the product schedules and corporate
cultures that have prevented code from making its way upstream.

Kevin

[1] https://lists.linux-foundation.org/pipermail/linux-pm/2010-May/025501.html
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