linux-kernel - Re: [BUG] MIPS: Hibernation in the latest linux-mips:master branch not work

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Message-ID: <20090702064612.GB18157@elf.ucw.cz>
Date:	Thu, 2 Jul 2009 08:46:12 +0200
From:	Pavel Machek <pavel@....cz>
To:	Ralf Baechle <ralf@...ux-mips.org>
Cc:	Wu Zhangjin <wuzhangjin@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-mips@...ux-mips.org
Subject: Re: [BUG] MIPS: Hibernation in the latest linux-mips:master branch
	not work

On Wed 2009-07-01 19:07:15, Ralf Baechle wrote:
> On Tue, Jun 30, 2009 at 11:11:27PM +0800, Wu Zhangjin wrote:
> 
> > hi, ralf, in the latest master branch of linux-mips git repo, seems
> > there is a need to select the SYS_SUPPORTS_HOTPLUG_CPU option in every
> > uni-processor board, otherwise, the suspend/hibernation can not be used,
> > because you have set:
> > 
> > config ARCH_HIBERNATION_POSSIBLE
> >     def_bool y
> >     depends on SYS_SUPPORTS_HOTPLUG_CPU
> > 
> > config ARCH_SUSPEND_POSSIBLE
> >     def_bool y
> >     depends on SYS_SUPPORTS_HOTPLUG_CPU
> > 
> > so, the board-specific patch must be pushed by the maintainers of
> > boards. and if the board support SMP, they must implement the
> > mips-specific hotplug support, is this right? I have selected
> > SYS_SUPPORTS_HOTPLUG_CPU in LEMOTE_FULONG and will push a relative patch
> > later.
> 
> I think below patch should take care of this problem.  It simply assumes
> that all uniprocessor systems support suspend and hibernate.  That's an
> assumption that I'm not to unhappy with though it may force us to fix a
> few systems.
> 
>   Ralf
> 
> Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>

Acked-by: Pavel Machek <pavel@....cz>

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