Re: Why we put FAN to full speed in its suspend callback

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On Wednesday, January 22, 2014 05:04:54 PM Aaron Lu wrote:
> Hi,

Hi,

> I was trying to minimize system suspend time and it turned out there are
> firmwares that would do crazy things like delaying 10ms in FAN's power on
> control method. So I wonder why do we want to put the FAN into ACPI D0
> state when we are going to enter a sleep state? The code seems to be
> written according to Pavel's comment here:
> https://bugzilla.kernel.org/show_bug.cgi?id=5000#c6
> It would be great to understand why and remove that operation if
> possible, thanks for reading and taking your time bringing back your
> ancient memory :-)

Yes, this is for image creation code during hibernation and the same set of
callbacks was used for hibernation and suspend at that time.  I think we can
remove that thing for system suspend and leave it for hibernation only.

Thanks!

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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