From: Ming Lei <tom.leiming@gmail.com>
Date: Fri, 22 Oct 2010 21:48:14 +0000 (+0200)
Subject: PM / Runtime: fix recursive locking warning of lockdep from rpm_resume()
X-Git-Tag: v2.6.37-rc1~99^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d63be5f924cf054e7ac18bb2761f9533039fb076;p=pandora-kernel.git

PM / Runtime: fix recursive locking warning of lockdep from rpm_resume()

For device with no_callbacks flag set, its power lock and its parent's
power lock may be held nestedly in rpm_resume, so we should take
spin_lock_nested(lock, SINGLE_DEPTH_NESTING) to acquire parent power lock
to avoid lockdep warning.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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