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| author | Len Brown <len.brown@intel.com> | 2009-04-05 01:52:07 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-04-05 01:52:07 -0400 |
| commit | 8a3f257c704e02aee9869decd069a806b45be3f1 (patch) | |
| tree | adb9d3766c57119381304c3b94334997cc7a74a7 /arch | |
| parent | 33526a53600ac887d100e3c9b4be3637ac8ae3a5 (diff) | |
| parent | 15065531c1c5902775ae3ade24eb37d0e688353b (diff) | |
| download | linux-8a3f257c704e02aee9869decd069a806b45be3f1.tar.bz2 | |
Merge branch 'misc' into release
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/acpi/boot.c | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | 12 |
2 files changed, 13 insertions, 1 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 565e70c7ca93..4f942096291d 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -1548,7 +1548,7 @@ static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d) /* * If your system is blacklisted here, but you find that acpi=force - * works for you, please contact acpi-devel@sourceforge.net + * works for you, please contact linux-acpi@vger.kernel.org */ static struct dmi_system_id __initdata acpi_dmi_table[] = { /* diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c index 4b1c319d30c3..89c676d6caf7 100644 --- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c +++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c @@ -680,6 +680,18 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) perf->states[i].transition_latency * 1000; } + /* Check for high latency (>20uS) from buggy BIOSes, like on T42 */ + if (perf->control_register.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE && + policy->cpuinfo.transition_latency > 20 * 1000) { + static int print_once; + policy->cpuinfo.transition_latency = 20 * 1000; + if (!print_once) { + print_once = 1; + printk(KERN_INFO "Capping off P-state tranision latency" + " at 20 uS\n"); + } + } + data->max_freq = perf->states[0].core_frequency * 1000; /* table init */ for (i=0; i<perf->state_count; i++) { |