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Date:      Sat, 12 Jan 2008 00:25:54 +0000
From:      "Igor Mozolevsky" <igor@hybrid-lab.co.uk>
To:        ticso@cicely.de
Cc:        Mark Linimon <linimon@lonesome.com>, freebsd-current@freebsd.org, Peter Schuller <peter.schuller@infidyne.com>
Subject:   Re: Improving the handling of PR:s
Message-ID:  <a2b6592c0801111625k5028530bo39662dece323db0f@mail.gmail.com>
In-Reply-To: <20080112002305.GE79270@cicely12.cicely.de>
References:  <478556AD.6090400@bsdforen.de> <20080110003524.GB5188@soaustin.net> <200801111935.50821.peter.schuller@infidyne.com> <20080111211019.GC79270@cicely12.cicely.de> <a2b6592c0801111520n173b4240p41d105c936f425ee@mail.gmail.com> <20080112002305.GE79270@cicely12.cicely.de>

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On 12/01/2008, Bernd Walter <ticso@cicely12.cicely.de> wrote:

> > > Another point about hardware is that a patch might influence other
> > > hardware handled by the same driver, which can't be verified by the
> > > submitter nor the committer.
> > > This is especially true with workarounds, which might only be required
> > > for specific chip revisions.
> >
> > Which can only be verified/fixed once the patch is merged into a
> > branch and new PRs are filed, if everyone used the approach of "let's
> > not touch it because something might go wrong", nobody would fly
> > because they might be involved in a plane-crash (of a similar model of
> > a plane, just slightly different configuration)...
>
> Planes are different to chips - they are documented well.
> You can't try and false on patching within the tree.
> Errors can happen, but you have at least do the best to avoid bad
> effects on hardware which runs fine so far.
>
> > The procedure would be effectively:
> >
> > patch->commit->[fixed|PR->limit the scope of the patch->commit]+
>
> Hardware doesn't always work this way.
> A fix for one HW can break another.

Which is why is said *PR->limit the scope of the patch* part!

Igor :-/



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