Re: [PATCH] Remove process freezer from suspend to RAM pathway

Benjamin Herrenschmidt
2007-07-09T09:15:19Z

On Mon, 2007-07-09 at 08:52 +0200, Oliver Neukum wrote:
> Am Sonntag, 8. Juli 2007 schrieb Benjamin Herrenschmidt:
> > Another issue that's been a problem forever with suspend is the
> > synchronous request_firmware interface. Lots of drivers do that in
> > resume() which will generally not work.
>
> Unfortunately yes they do. We now have the notifier chains, which
> can be used. Firmware, especially if it is large, must be requested
> while the system is still fully functional and paging will work.
>
> Asynchronocity will not help much because the devices must work
> after resumingand delaying that will not help with respect to needing
> devices to get at the firmware.

True, pre-loading is the best approach.

Ben.