diff options
| author | Perry Yuan <[email protected]> | 2024-04-25 08:07:57 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <[email protected]> | 2024-04-26 17:35:38 +0000 |
| commit | 5f8f9bc4d7bc8d44031b88b548c2572b746e2611 (patch) | |
| tree | 79255ec02f905a0df748214b3380a624c534907d /drivers/acpi/cppc_acpi.c | |
| parent | cpufreq: amd-pstate: get transition delay and latency value from ACPI tables (diff) | |
| download | kernel-5f8f9bc4d7bc8d44031b88b548c2572b746e2611.tar.gz kernel-5f8f9bc4d7bc8d44031b88b548c2572b746e2611.zip | |
cppc_acpi: print error message if CPPC is unsupported
The amd-pstate driver can fail when _CPC objects are not supported by
the CPU. However, the current error message is ambiguous (see below) and
there is no clear way for attributing the failure of the amd-pstate
driver to the lack of CPPC support.
[ 0.477523] amd_pstate: the _CPC object is not present in SBIOS or ACPI disabled
Fix this by adding an debug message to notify the user if the amd-pstate
driver failed to load due to CPPC not be supported by the CPU
Reviewed-by: Mario Limonciello <[email protected]>
Reviewed-by: Gautham R. Shenoy <[email protected]>
Tested-by: Dhananjay Ugwekar <[email protected]>
Signed-off-by: Perry Yuan <[email protected]>
Acked-by: Huang Rui <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Diffstat (limited to 'drivers/acpi/cppc_acpi.c')
| -rw-r--r-- | drivers/acpi/cppc_acpi.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 4bfbe55553f4..3134101f31b6 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -686,8 +686,10 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr) if (!osc_sb_cppc2_support_acked) { pr_debug("CPPC v2 _OSC not acked\n"); - if (!cpc_supported_by_cpu()) + if (!cpc_supported_by_cpu()) { + pr_debug("CPPC is not supported by the CPU\n"); return -ENODEV; + } } /* Parse the ACPI _CPC table for this CPU. */ |