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authorAlexey Starikovskiy <aystarik@gmail.com>2007-11-26 20:42:19 +0100
committerIngo Molnar <mingo@elte.hu>2007-11-26 20:42:19 +0100
commitc1c306344669ca40255e36192b101060ffbb1271 (patch)
tree292c7936d91b8ed2febb3e2902de41d0e6c84bca /drivers/acpi
parentd4d25deca49ec2527a634557bf5a6cf449f85deb (diff)
downloadop-kernel-dev-c1c306344669ca40255e36192b101060ffbb1271.zip
op-kernel-dev-c1c306344669ca40255e36192b101060ffbb1271.tar.gz
ACPI: Set max_cstate to 1 for early Opterons.
AMD Opteron processors before CG revision don't like C-states > 1. This solves the long standing bugzilla #5303 and probably some more on affected machines: http://bugzilla.kernel.org/show_bug.cgi?id=5303 [ tglx@linutronix.de: reworked the patch so it does not wreck ia64 ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/processor_idle.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index f996d0e..b52109b 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1658,6 +1658,7 @@ int __cpuinit acpi_processor_power_init(struct acpi_processor *pr,
if (!first_run) {
dmi_check_system(processor_power_dmi_table);
+ max_cstate = acpi_processor_cstate_check(max_cstate);
if (max_cstate < ACPI_C_STATES_MAX)
printk(KERN_NOTICE
"ACPI: processor limited to max C-state %d\n",
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