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| author | David S. Miller <davem@davemloft.net> | 2008-12-02 19:50:27 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-12-02 19:50:27 -0800 |
| commit | aa2ba5f1082dc705745899584aac8416d710c056 (patch) | |
| tree | bde0bf4aff036c6bac19a0212194ae1092afb3c9 /arch/x86/kernel/cpu/cpufreq/powernow-k8.c | |
| parent | 68024541e2e5a8f35e281daaa5068a29e2a538a5 (diff) | |
| parent | f6f7b52e2f6149d2ee365717afff315b05720162 (diff) | |
| download | op-kernel-dev-aa2ba5f1082dc705745899584aac8416d710c056.zip op-kernel-dev-aa2ba5f1082dc705745899584aac8416d710c056.tar.gz | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts:
drivers/net/ixgbe/ixgbe_main.c
drivers/net/smc91x.c
Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq/powernow-k8.c')
| -rw-r--r-- | arch/x86/kernel/cpu/cpufreq/powernow-k8.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c index d3dcd58..7f05f44 100644 --- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c @@ -115,9 +115,20 @@ static int query_current_values_with_pending_wait(struct powernow_k8_data *data) u32 i = 0; if (cpu_family == CPU_HW_PSTATE) { - rdmsr(MSR_PSTATE_STATUS, lo, hi); - i = lo & HW_PSTATE_MASK; - data->currpstate = i; + if (data->currpstate == HW_PSTATE_INVALID) { + /* read (initial) hw pstate if not yet set */ + rdmsr(MSR_PSTATE_STATUS, lo, hi); + i = lo & HW_PSTATE_MASK; + + /* + * a workaround for family 11h erratum 311 might cause + * an "out-of-range Pstate if the core is in Pstate-0 + */ + if (i >= data->numps) + data->currpstate = HW_PSTATE_0; + else + data->currpstate = i; + } return 0; } do { @@ -1121,6 +1132,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol) } data->cpu = pol->cpu; + data->currpstate = HW_PSTATE_INVALID; if (powernow_k8_cpu_init_acpi(data)) { /* |
