cpuidle: Add a poll_idle method

Add a default poll idle state with 0 latency. Provides an option to users
to use poll_idle by using 0 as the latency requirement.

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

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index fea71597b40a..32488e6f76ab 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1628,7 +1628,7 @@ struct cpuidle_driver acpi_idle_driver = {
  */
 static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
 {
-        int i, count = 0;
+        int i, count = CPUIDLE_DRIVER_STATE_START;
         struct acpi_processor_cx *cx;
         struct cpuidle_state *state;
         struct cpuidle_device *dev = &pr->power.dev;
@@ -1687,6 +1687,8 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
                 }
 
                 count++;
+                if (count == CPUIDLE_STATE_MAX)
+                        break;
         }
 
         dev->state_count = count;