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DateTue, 10 Feb 2004 22:46:05 -0800
FromStephen Hemminger <>
SubjectRe: Fwd: [Swsusp-devel] Kernel 2.6 pm_send_all() issues.
Michael Frank wrote:

> This question is probably better suited for LKML.
>
> ---------- Forwarded Message ----------
>
> Subject: [Swsusp-devel] Kernel 2.6 pm_send_all() issues.
> Date: Tuesday 10 February 2004 04:06
> From: Wolfgang Glas <wolfgang.glas@ev-i.at>
> To: swsusp-devel@lists.sourceforge.net
>
> Coming back to an earlier post, which states, that NVidia suspend/resume under
> 2.6.x could be resurrected, if drivers_suspend() and drivers_resume() in
> swsusp.c are tuned in a way, that pm_send_all() is called, I want to direct
> the following question to more eligible persons in this list:
>
> I inspected NVidia's driver and I found out, that it's implemented as a
> character device and hence does not implement the suspend/resume kernel
> driver interface, which has been introduced in linux-2.6. But nevertheless
> this driver has the ability to register its own power management handler
> through pm_register(), an interface already present in linux-2.4 and still
> used in some 20 drivers present in the linux-2.6.1 code base, most notable
> some audio driver and some irda drivers.
>
> Diving further into the code, I recognized, that the kernel function
> ppm_send_all(), which calls all handlers registered through pm_register() is
> never called inside of swsusp2.c
>
> So, what I want to ask is, whether the pm_register/pm_send/pm_send_all
> interface is simply deprecated and the NVidia driver (and other drivers,
> which use pm_register) should be reeingineered in order to use the
> resume/suspend interface of linux-2.6. Or should we try to modify swsusp2.c
> in a way, that it additionally calls pm_send_all for these drivers?
>
> TIA,
>
> Wolfgang

I sent them a patch that converts the PCI device to the device model and
uses suspend/resume hooks. But they didn't seem to put it in the
current version
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