linux-kernel - ACPI ERROR SMBus or IPMI write requires Buff of len 66, found 32...???? linux-3.0.0

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Date:	Mon, 31 Oct 2011 14:16:17 -0700
From:	Linda Walsh <lkml@...nx.org>
To:	LKML <linux-kernel@...r.kernel.org>
Subject: ACPI ERROR SMBus or IPMI write requires Buff of len 66, found 32...???? linux-3.0.0

Was looking through boot log messages, and this one seemed 'new'...

is this saying that the device requires 66, but the driver allocated 32 
bytes?

Or the opposite: i.e. driver requires 66 (according to some new 
standard**) but the
device from 2009, has the 2009 standard of 32?

Just a WAG, but 20110413 looks like a date, that is certainly newer than 
the system, though
it has had firmware upgrades (though none in the past 6 months or so...)...

Seems like a weird thing to be changed across drivers while not 
providing for some backward
compat, but that's purely based on a notion that there's a driver/hw 
version mismatch now
when before, there were no such error messages (maybe the error message 
is new, and it's
always been broken? ;-) )...

as subj says linux-3.0.0, stock vanilla + the latest IMQ networkfilter 
patch.
X64

[   13.722612] ACPI Error: SMBus or IPMI write requires Buffer of length 
66, found length 32 (20110413/exfield-285)
[   13.733078] ACPI Error: Method parse/execution failed 
[\_SB_.PMI0._GHL] (Node ffff880616962b18), AE_AML_BUFFER_LIMIT 
(20110413/psparse-536)
[   13.746189] ACPI Error: Method parse/execution failed 
[\_SB_.PMI0._PMC] (Node ffff880616962a78), AE_AML_BUFFER_LIMIT
[   13.755322] dca service started, version 1.12.1[   13.761822]  
(20110413/psparse-536)
[   13.765509] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMC 
(20110413/power_meter-773)

Did something that would cause this?  I haven't determined what the 
impact of the above
problem is -- it might be some status progs no longer work OR maybe 
never worked, and now
may have a clue... ?   Any insights?

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