linux-kernel - Re: [PATCH] hwmon: applesmc: restore keyboard backlight on resume

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Message-Id: <20090824140717.e7011b8c.akpm@linux-foundation.org>
Date:	Mon, 24 Aug 2009 14:07:17 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Henrik Rydberg" <rydberg@...omail.se>
Cc:	nicolas@...chat.ch, lm-sensors@...sensors.org,
	linux-kernel@...r.kernel.org, rydberg@...omail.se
Subject: Re: [PATCH] hwmon: applesmc: restore keyboard backlight on resume

On Sat, 22 Aug 2009 23:33:52 +0200
"Henrik Rydberg" <rydberg@...omail.se> wrote:

> On resume from suspend, the driver currently resets the logical
> state as if it was brought up from halt. This patch uses the
> dev_pm_ops.resume method to synchronize the hardware with the
> memorized logical state, bringing back the backlight to the level
> prior to suspend.

What are the runtime effects of this change?
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