Re: [BUG] [hwmon] linux 2.6.31-rc6 regression

[Matthew Garrett <mjg59@srcf.ucam.org>]

On Sun, Aug 16, 2009 at 04:39:35PM +0200, Stefan Richter wrote:
> Matthew Garrett wrote:
>> On Sun, Aug 16, 2009 at 07:37:35AM +0200, Markus Trippelsdorf wrote:
>>> On Sun, Aug 16, 2009 at 02:03:03AM +0100, Matthew Garrett wrote:
>>>> The hwmon driver is attempting to allocate a region that's also 
>>>> used by your ACPI firmware. There's no way to synchronise access 
>>>> between the kernel and the firmware, so allowing both is 
>>>> potentially racy - we've seen numerous cases where the combination 
>>>> results in the system incorrectly generating critical temperatuer 
>>>> shutdowns, for instance, when some other indexed access gets 
>>>> interpreted as the temperature or when the hwmon chip's state 
>>>> machine is confused. The failure of hwmon to bind is a feature 
>>>> here, not a bug. You can override it with  
>>>> acpi_enforce_resources=no on the kernel command line.
>>> But we don't introduce »features« that break hardware monitoring on
>>> numerous machines in rc6 normally, IIRC.
>>> If this so important and critical to you, than just add a »hyperstrict«
>>> parameter to acpi_enforce_resources or make »lax« the default.
>>
>> It's not - 2.6.29 had this behaviour, and it got broken in 2.6.30. This 
>> restores the status quo.
>
> Then why did my 2.6.29 did _not_ have this behavior?
> (here: ASUS M3A78-EM, it87 driver)

Some other bug?

-- 
Matthew Garrett | mjg59@srcf.ucam.org