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| author | Len Brown <len.brown@intel.com> | 2005-11-30 21:55:14 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2005-11-30 21:55:14 -0500 |
| commit | 7dac562f6d89b3f70c3f12b0e17878b07af42298 (patch) | |
| tree | be68146ab85763871c93549e42c065caea2cab36 /drivers | |
| parent | 3141b6708dd9ad09b6667c23393cfdc25b127771 (diff) | |
| parent | 4c0335526c95d90a1d958e0059f40a5745fc7c5d (diff) | |
| download | linux-7dac562f6d89b3f70c3f12b0e17878b07af42298.tar.gz linux-7dac562f6d89b3f70c3f12b0e17878b07af42298.tar.bz2 linux-7dac562f6d89b3f70c3f12b0e17878b07af42298.zip | |
Pull 5165 into release branch
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/processor_idle.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 70d8a6ec0920..83fd1b6c10c4 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -280,6 +280,16 @@ static void acpi_processor_idle(void) cx->usage++; +#ifdef CONFIG_HOTPLUG_CPU + /* + * Check for P_LVL2_UP flag before entering C2 and above on + * an SMP system. We do it here instead of doing it at _CST/P_LVL + * 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; +#endif /* * Sleep: * ------ @@ -534,6 +544,15 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr) pr->power.states[ACPI_STATE_C0].valid = 1; pr->power.states[ACPI_STATE_C1].valid = 1; +#ifndef CONFIG_HOTPLUG_CPU + /* + * Check for P_LVL2_UP flag before entering C2 and above on + * an SMP system. + */ + if ((num_online_cpus() > 1) && acpi_fadt.plvl2_up) + return_VALUE(-ENODEV); +#endif + /* determine C2 and C3 address from pblk */ pr->power.states[ACPI_STATE_C2].address = pr->pblk + 4; pr->power.states[ACPI_STATE_C3].address = pr->pblk + 5; @@ -690,7 +709,7 @@ static int acpi_processor_get_power_info_cst(struct acpi_processor *pr) /* Validate number of power states discovered */ if (pr->power.count < 2) - status = -ENODEV; + status = -EFAULT; end: acpi_os_free(buffer.pointer); @@ -841,11 +860,11 @@ static int acpi_processor_get_power_info(struct acpi_processor *pr) * this function */ result = acpi_processor_get_power_info_cst(pr); - if ((result) || (acpi_processor_power_verify(pr) < 2)) { + if (result == -ENODEV) result = acpi_processor_get_power_info_fadt(pr); - if ((result) || (acpi_processor_power_verify(pr) < 2)) - result = acpi_processor_get_power_info_default_c1(pr); - } + + if ((result) || (acpi_processor_power_verify(pr) < 2)) + result = acpi_processor_get_power_info_default_c1(pr); /* * Set Default Policy |