linux-kernel - Re: [PATCH v2 00/20] rtc: omap: fixes and power-off feature

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20141028084745.GY12379@n2100.arm.linux.org.uk>
Date:	Tue, 28 Oct 2014 08:47:46 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Johan Hovold <johan@...nel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Felipe Balbi <balbi@...com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Tony Lindgren <tony@...mide.com>,
	Benoît Cousson <bcousson@...libre.com>,
	Lokesh Vutla <lokeshvutla@...com>,
	Guenter Roeck <linux@...ck-us.net>, nsekhar@...com,
	t-kristo@...com, j-keerthy@...com, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 00/20] rtc: omap: fixes and power-off feature

On Tue, Oct 28, 2014 at 09:16:16AM +0100, Johan Hovold wrote:
> It looks like we're soon to be having power-off call chains, with
> configurable priorities, to shut of various parts of the hardware

I really hope that they *don't* get used like that.  I guess this is
what happens when people don't read the code before they decide to
implement something.

All the reboot/power off/halt methods already call into the driver model,
and the driver model then iterates over all bound drivers calling their
"shutdown" method.  So, today, as it has been for years, all device
drivers are notified of system power off.

That's where most device drivers should be cleanly stopping their
hardware.

The only thing which is left is the actual hardware triggering of the
action, and that should be what's done via the notifier.

-- 
FTTC broadband for 0.8mile line: currently at 9.5Mbps down 400kbps up
according to speedtest.net.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/