Re: [PATCH 6/9] ACPI: thinkpad-acpi: add sysfs support to fan subdriver

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On Wed, 25 Apr 2007, Len Brown wrote:
> It seems like it is enough rope for users to hang themselves,
> and the need for a "safety net" seems to confirm that.

I will cook up a patch that removes the experimental status of fan control,
and adds in its place an explicit toggle to enable fan control (as opposed
to fan monitoring, i.e. read-only operations) as a module parameter.  And it
will default to "fan control is forbidden".

That way, the user has to effectively tell the kernel, through the kernel
command line or a module parameter, that he wants thinkpad-acpi to be
capable of writing fan control information to the EC.  Otherwise the driver
will return -EPERM on all fan control operations, and just allow one to read
fan status.

What do you think?

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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