cpuidle: fix HP nx6125 regression

Fix for http://bugzilla.kernel.org/show_bug.cgi?id=9355

cpuidle always used to fallback to C2 if there is some bm activity while
entering C3. But, presence of C2 is not always guaranteed. Change cpuidle
algorithm to detect a safe_state to fallback in case of bm_activity and
use that state instead of C2.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 16a51546db44..c4e00161a247 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -92,6 +92,7 @@ struct cpuidle_device {
         struct kobject          kobj;
         struct completion       kobj_unregister;
         void                    *governor_data;
+        struct cpuidle_state    *safe_state;
 };
 
 DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices);