[PATCH v2 6/9] intel_idle: do C1E promotion disable quirk for hotplugged CPUs

Bartlomiej Zolnierkiewicz b.zolnierkie at samsung.com
Sat Dec 21 05:47:28 EST 2013

If the system is booted with some CPUs offline C1E promotion disable quirk
won't be applied because on_each_cpu() in intel_idle_cpuidle_driver_init()
operates only on online CPUs. Fix it by adding the C1E promotion disable
handling to intel_idle_cpu_init() (which is also called during CPU_ONLINE

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
Cc: Len Brown <lenb at kernel.org>
 drivers/idle/intel_idle.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 92d1206..38da3fb 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -683,6 +683,9 @@ static int intel_idle_cpu_init(int cpu)
 	if (icpu->auto_demotion_disable_flags)
 		smp_call_function_single(cpu, auto_demotion_disable, NULL, 1);
+	if (icpu->disable_promotion_to_c1e)
+		smp_call_function_single(cpu, c1e_promotion_disable, NULL, 1);
 	return 0;

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