cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic

The only place where the time is invalid is when the ACPI_CSTATE_FFH entry
method is not set. Otherwise for all the drivers, the time can be correctly
measured.

Instead of duplicating the CPUIDLE_FLAG_TIME_VALID flag in all the drivers
for all the states, just invert the logic by replacing it by the flag
CPUIDLE_FLAG_TIME_INVALID, hence we can set this flag only for the acpi idle
driver, remove the former flag from all the drivers and invert the logic with
this flag in the different governor.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 17f9ec501972..380b4b43f361 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -985,8 +985,8 @@ static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
                 state->flags = 0;
                 switch (cx->type) {
                         case ACPI_STATE_C1:
-                        if (cx->entry_method == ACPI_CSTATE_FFH)
-                                state->flags |= CPUIDLE_FLAG_TIME_VALID;
+                        if (cx->entry_method != ACPI_CSTATE_FFH)
+                                state->flags |= CPUIDLE_FLAG_TIME_INVALID;
 
                         state->enter = acpi_idle_enter_c1;
                         state->enter_dead = acpi_idle_play_dead;
@@ -994,14 +994,12 @@ static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
                         break;
 
                         case ACPI_STATE_C2:
-                        state->flags |= CPUIDLE_FLAG_TIME_VALID;
                         state->enter = acpi_idle_enter_simple;
                         state->enter_dead = acpi_idle_play_dead;
                         drv->safe_state_index = count;
                         break;
 
                         case ACPI_STATE_C3:
-                        state->flags |= CPUIDLE_FLAG_TIME_VALID;
                         state->enter = pr->flags.bm_check ?
                                         acpi_idle_enter_bm :
                                         acpi_idle_enter_simple;