linux-kernel - Re: [RFC] firmware coredump: add new firmware coredump class

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Message-ID: <CAKMK7uG9wodJr1w9EWA4H5ssogK=8z=j70KmtAiCF6=0_cZS9w@mail.gmail.com>
Date:	Wed, 3 Sep 2014 21:24:10 +0200
From:	Daniel Vetter <daniel.vetter@...ll.ch>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Seth Forshee <seth.forshee@...onical.com>,
	Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
	luca@...lho.fi, kvalo@...rom.com
Subject: Re: [RFC] firmware coredump: add new firmware coredump class

On Wed, Sep 3, 2014 at 9:05 PM, Johannes Berg <johannes@...solutions.net> wrote:
>
>> And if we want to use this for i915 we need some way for tools to go
>> from the i915 drm class device node to the error state, not just from
>> the error state back to the device.
>
> Interesting. That's probably not all that difficult to do (maybe even
> set up a child/parent relationship?) but I actually wanted to avoid a
> hard dependency since there may be cases where the failing device
> disappears, e.g. in the case of USB. I have to think about this case
> more, I guess.

Yeah a hard parent/child won't because the device might drop off the
bus while committing seppuku. But I think we need to be able to follow
the link both ways.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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