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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-02-02 23:55:42 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-02-02 23:55:42 +0100
commitadcb2623f149abd4d4783ecada543a01e25d1c04 (patch)
treea89e14ec1a6e68ac8163224a720bb529ab9b0e1c /drivers/acpi/processor_idle.c
parent67f592c8f681061d69c621b97a868e679c8a77be (diff)
downloadblackbird-op-linux-adcb2623f149abd4d4783ecada543a01e25d1c04.tar.gz
blackbird-op-linux-adcb2623f149abd4d4783ecada543a01e25d1c04.zip
ACPI / cpuidle: Clean up fallback to C1 checks
acpi_idle_enter_simple() and acpi_idle_enter_bm() both check if C2/C3 type entry is supported on MP in the same way, so move those checks to a separate function and call it from both places (and it doesn't need to check if the state type is not C1, because the functions in question won't be called otherwise). While at it, use IS_ENABLED() for the CONFIG_HOTPLUG_CPU check. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c19
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index ceeff3d473f1..94c85ff2d123 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -758,6 +758,13 @@ static int acpi_idle_play_dead(struct cpuidle_device *dev, int index)
return 0;
}
+static bool acpi_idle_fallback_to_c1(struct acpi_processor *pr)
+{
+ return IS_ENABLED(CONFIG_HOTPLUG_CPU) && num_online_cpus() > 1 &&
+ !(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED) &&
+ !pr->flags.has_cst;
+}
+
/**
* acpi_idle_enter_simple - enters an ACPI state without BM handling
* @dev: the target CPU
@@ -775,12 +782,8 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
if (unlikely(!pr))
return -EINVAL;
-#ifdef CONFIG_HOTPLUG_CPU
- if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) &&
- !pr->flags.has_cst &&
- !(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED))
+ if (acpi_idle_fallback_to_c1(pr))
return acpi_idle_enter_c1(dev, drv, CPUIDLE_DRIVER_STATE_START);
-#endif
/*
* Must be done before busmaster disable as we might need to
@@ -819,12 +822,8 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
if (unlikely(!pr))
return -EINVAL;
-#ifdef CONFIG_HOTPLUG_CPU
- if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) &&
- !pr->flags.has_cst &&
- !(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED))
+ if (acpi_idle_fallback_to_c1(pr))
return acpi_idle_enter_c1(dev, drv, CPUIDLE_DRIVER_STATE_START);
-#endif
if (!cx->bm_sts_skip && acpi_idle_bm_check()) {
if (drv->safe_state_index >= 0) {
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