From: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Date: Tue, 27 Jan 2009 16:38:45 +0000 (+0100)
Subject: cpuidle: use last_state which can reflect the actual state entered
X-Git-Tag: v2.6.27.15~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e703f5777cc32d55a8d926df51fd3a07a4ee3d9;p=pandora-kernel.git

cpuidle: use last_state which can reflect the actual state entered

commit 887e301aa1105326f1412a98749024263b1031c7 upstream

cpuidle accounts the idle time for the C-state it was trying to enter and
not to the actual state that the driver eventually entered. The driver may
select a different state than the one chosen by cpuidle due to
constraints like bus-mastering, etc.

Change the time acounting code to look at the dev->last_state after
returning from target_state->enter(). Driver can modify dev->last_state
internally, inside the enter routine to reflect the actual C-state
entered.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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