[flashrom] DMI matching patch

Carl-Daniel Hailfinger c-d.hailfinger.devel.2006 at gmx.net
Thu Jan 7 16:01:10 CET 2010

On 07.01.2010 15:47, Luc Verhaegen wrote:
> On Thu, Jan 07, 2010 at 03:37:04PM +0100, Carl-Daniel Hailfinger wrote:
>> On 07.01.2010 11:16, Michael Karcher wrote:
>>> That's what I expected, and that's why I didn't commit yet. I won't
>>> commit until you and Carl-Daniel agree on the necessity of providing
>>> which string to match, although I slightly prefer the explicit
>>> specification of the string to match.
>> The explicit string match has the advantage of being extensible. More below.
>>> Looking at the Asus P5A example (I know that this board is severly
>>> outdated, which might make this point less strong) there are no
>>> subsystem IDs at all in it. So when we start looking for DMI info we
>>> don't have any indication yet that we are on an Asus board. If we really
>>> have good subsystem IDs, we don't need DMI.
>> Yes. And in case we ever want to match two strings at once, the "bp:^A8V
>> MX$" can be extended easily to
>> "bvbp:^ASUS$:^A8V MX$" without changing any structs at all. Especially
>> in the case where there is no usable PCI subsystem ID (board vendor not
>> present) this may come handy. I'd wait for such an extension until we
>> really desperately need it, though.
> >From some previous mail:
>>> I don't think we need the "any:" prefix (I think I would have written it
>>> as "??:") at all. The match-any policy was in just to shorten the table
>>> entry.
>> This whole thing is why i was initially very weary of *^$ in these
>> strings. People end up trying to go beyond when they see something like
>> that, it's something psychological that i have seen at play more often
>> in these cases.

Ah, I understood "go beyond" as trying to use unsupported regexps, which
will be caught during review.
My extensibility point was about not having to mess with the whole table
each time we need changes in the DMI match policy.


Developer quote of the year:
"We are juggling too many chainsaws and flaming arrows and tigers."

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