diff options
| author | David Shaohua Li <shaohua.li@intel.com> | 2005-12-01 17:00:00 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2005-12-05 17:00:37 -0500 |
| commit | 1e483969930a82e16767884449f3a121a817ef00 (patch) | |
| tree | 9d110ed1c66f71762c88cbf5d83ea35467f46a14 /drivers/acpi/processor_idle.c | |
| parent | 4c0335526c95d90a1d958e0059f40a5745fc7c5d (diff) | |
[ACPI] correct earlier SMP deep C-states on HT patch
http://bugzilla.kernel.org/show_bug.cgi?id=5165
Change polarity of test for PLVL2_UP flag.
Skip promotion/demotion code when not needed.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 83fd1b6c10c4..800f99c4c0ef 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -278,8 +278,6 @@ static void acpi_processor_idle(void) } } - cx->usage++; - #ifdef CONFIG_HOTPLUG_CPU /* * Check for P_LVL2_UP flag before entering C2 and above on @@ -287,9 +285,12 @@ static void acpi_processor_idle(void) * detection phase, to work cleanly with logical CPU hotplug. */ if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) && - !pr->flags.has_cst && acpi_fadt.plvl2_up) - cx->type = ACPI_STATE_C1; + !pr->flags.has_cst && !acpi_fadt.plvl2_up) + cx = &pr->power.states[ACPI_STATE_C1]; #endif + + cx->usage++; + /* * Sleep: * ------ @@ -378,6 +379,15 @@ static void acpi_processor_idle(void) next_state = pr->power.state; +#ifdef CONFIG_HOTPLUG_CPU + /* Don't do promotion/demotion */ + if ((cx->type == ACPI_STATE_C1) && (num_online_cpus() > 1) && + !pr->flags.has_cst && !acpi_fadt.plvl2_up) { + next_state = cx; + goto end; + } +#endif + /* * Promotion? * ---------- @@ -549,7 +559,7 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr) * Check for P_LVL2_UP flag before entering C2 and above on * an SMP system. */ - if ((num_online_cpus() > 1) && acpi_fadt.plvl2_up) + if ((num_online_cpus() > 1) && !acpi_fadt.plvl2_up) return_VALUE(-ENODEV); #endif |