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| author | Linus Walleij <linus.walleij@linaro.org> | 2019-04-08 13:03:09 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-04-08 13:03:09 +0200 |
| commit | 26af34079f1d8299932303cfd2b376b9cf55a35c (patch) | |
| tree | f1a9824855fae569aa51c2109a5929715143093d /drivers/acpi/cppc_acpi.c | |
| parent | 27157af66324d529b43231c12b5d1e1a3e9fa620 (diff) | |
| parent | 79a3aaa7b82e3106be97842dedfd8429248896e6 (diff) | |
Merge tag 'v5.1-rc3' into devel
Linux 5.1-rc3
Diffstat (limited to 'drivers/acpi/cppc_acpi.c')
| -rw-r--r-- | drivers/acpi/cppc_acpi.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 1b207fca1420..d4244e7d0e38 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -1150,8 +1150,13 @@ int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps) cpc_read(cpunum, nominal_reg, &nom); perf_caps->nominal_perf = nom; - cpc_read(cpunum, guaranteed_reg, &guaranteed); - perf_caps->guaranteed_perf = guaranteed; + if (guaranteed_reg->type != ACPI_TYPE_BUFFER || + IS_NULL_REG(&guaranteed_reg->cpc_entry.reg)) { + perf_caps->guaranteed_perf = 0; + } else { + cpc_read(cpunum, guaranteed_reg, &guaranteed); + perf_caps->guaranteed_perf = guaranteed; + } cpc_read(cpunum, lowest_non_linear_reg, &min_nonlinear); perf_caps->lowest_nonlinear_perf = min_nonlinear; |