On Fri, 24 Sep 2004, Oliver Neukum wrote:

> Upon second thought, user space should write the firmware _before_
> it initiates suspend, so that the firmware is part of the image as it is
> read back. If you request a suspend without writing firmware, it's
> your fault. You brake it, you can keep the pieces.
> Firmware for swap devices must be in kernel always.

Why is that?  When idling devices before preparing the image there's no 
need to power down so far that the device loses its firmware.  When 
reading the image back from the swap partition you've got a fully-running 
kernel available.

The problem is different when you just want to save power without 
suspending the whole system.  Obviously you should never do this to a swap 
device if you will be unable to reload its firmware.

Alan Stern




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