diff options
| author | Dave Airlie <airlied@redhat.com> | 2019-04-15 15:51:49 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2019-04-15 15:51:49 +1000 |
| commit | f06ddb53096b4cddad2c530125a78a3c2a1d28a4 (patch) | |
| tree | 36a05922af22272dc82357ce82be21a3a9214bd0 /drivers/acpi/cppc_acpi.c | |
| parent | ecc4946f11a07884f230450a6d5a92337bc21375 (diff) | |
| parent | dc4060a5dc2557e6b5aa813bf5b73677299d62d2 (diff) | |
BackMerge v5.1-rc5 into drm-next
Need rc5 for udl fix to add udl cleanups on top.
Signed-off-by: Dave Airlie <airlied@redhat.com>
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; |