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path: root/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
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Diffstat (limited to 'arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c')
-rw-r--r--arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
index 10baa3501ed..18c8b67ea3a 100644
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -167,11 +167,13 @@ static void do_drv_read(struct drv_cmd *cmd)
static void do_drv_write(struct drv_cmd *cmd)
{
- u32 h = 0;
+ u32 lo, hi;
switch (cmd->type) {
case SYSTEM_INTEL_MSR_CAPABLE:
- wrmsr(cmd->addr.msr.reg, cmd->val, h);
+ rdmsr(cmd->addr.msr.reg, lo, hi);
+ lo = (lo & ~INTEL_MSR_RANGE) | (cmd->val & INTEL_MSR_RANGE);
+ wrmsr(cmd->addr.msr.reg, lo, hi);
break;
case SYSTEM_IO_CAPABLE:
acpi_os_write_port((acpi_io_address)cmd->addr.io.port,
@@ -372,7 +374,6 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
struct cpufreq_freqs freqs;
cpumask_t online_policy_cpus;
struct drv_cmd cmd;
- unsigned int msr;
unsigned int next_state = 0; /* Index into freq_table */
unsigned int next_perf_state = 0; /* Index into perf table */
unsigned int i;
@@ -417,11 +418,7 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
case SYSTEM_INTEL_MSR_CAPABLE:
cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
cmd.addr.msr.reg = MSR_IA32_PERF_CTL;
- msr =
- (u32) perf->states[next_perf_state].
- control & INTEL_MSR_RANGE;
- cmd.val = get_cur_val(online_policy_cpus);
- cmd.val = (cmd.val & ~INTEL_MSR_RANGE) | msr;
+ cmd.val = (u32) perf->states[next_perf_state].control;
break;
case SYSTEM_IO_CAPABLE:
cmd.type = SYSTEM_IO_CAPABLE;