[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>
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@ -278,8 +278,6 @@ static void acpi_processor_idle(void)
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}
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}
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cx->usage++;
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#ifdef CONFIG_HOTPLUG_CPU
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/*
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* Check for P_LVL2_UP flag before entering C2 and above on
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@ -287,9 +285,12 @@ static void acpi_processor_idle(void)
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* detection phase, to work cleanly with logical CPU hotplug.
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*/
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if ((cx->type != ACPI_STATE_C1) && (num_online_cpus() > 1) &&
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!pr->flags.has_cst && acpi_fadt.plvl2_up)
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cx->type = ACPI_STATE_C1;
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!pr->flags.has_cst && !acpi_fadt.plvl2_up)
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cx = &pr->power.states[ACPI_STATE_C1];
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#endif
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cx->usage++;
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/*
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* Sleep:
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* ------
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@ -378,6 +379,15 @@ static void acpi_processor_idle(void)
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next_state = pr->power.state;
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#ifdef CONFIG_HOTPLUG_CPU
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/* Don't do promotion/demotion */
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if ((cx->type == ACPI_STATE_C1) && (num_online_cpus() > 1) &&
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!pr->flags.has_cst && !acpi_fadt.plvl2_up) {
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next_state = cx;
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goto end;
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}
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#endif
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/*
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* Promotion?
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* ----------
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@ -549,7 +559,7 @@ static int acpi_processor_get_power_info_fadt(struct acpi_processor *pr)
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* Check for P_LVL2_UP flag before entering C2 and above on
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* an SMP system.
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*/
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if ((num_online_cpus() > 1) && acpi_fadt.plvl2_up)
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if ((num_online_cpus() > 1) && !acpi_fadt.plvl2_up)
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return_VALUE(-ENODEV);
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#endif
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