linux-kernel - Re: [PATCH 1/7] PCI PM: Fix handling of devices without drivers

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Date:	Wed, 04 Feb 2009 13:49:15 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux PCI <linux-pci@...r.kernel.org>,
	Eric Sesterhenn <snakebyte@....de>
Subject: Re: [PATCH 1/7] PCI PM: Fix handling of devices without drivers

On Tue, 2009-02-03 at 18:23 -0800, Linus Torvalds wrote:
> Whaa? This is basically totally obfuscated code both in the caller _and_ 
> in the callee.
> 
> Now, it looks like this all then goes away in PATCH 7/7, so I guess I 
> shouldn't complain too much, but I just don't see much point in carrying 
> this broken patch around in the series, since it's then going away and 
> rewritten almost immediately again.
> 
> Apart from that complaints, Acked-by: for the series. 

Same comments. It took me a while to figure the logic out, which I end
up agreeing with but the code is pretty obfuscated ... And yes, patch 7
seems to improve things, but then, that makes reading the patch itself
nearly impossible :-) I ended up patching the file and -then- reading
it.

I tried the whole thing on various powerbooks, along with some patches
I'm about to send for radeonfb, atyfb and aty128fb to make them properly
call pci_save_state() before they hand-change the D state, and things
appear to be working fine. (well, appart from some unrelated problems
leading to some might_sleep() hits but as I said, they are unrelated to
this series)

I need a couple more tests of the fbdev patches on some machine variants
and once done, I'll post them out. Hopefully tonight.

Cheers,
Ben.

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