4.19-stable review patch. If anyone has any objections, please let me know.
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From: Dou Liyang douly.fnst@cn.fujitsu.com
[ Upstream commit d0381bf4f80c571dde1244fe5b85dc35e8b3f546 ]
ACPI driver should make sure all the processor IDs in their ACPI Namespace are unique. the driver performs a depth-first walk of the namespace tree and calls the acpi_processor_ids_walk() to check the duplicate IDs.
But, the acpi_processor_ids_walk() mistakes the return value. If a processor is checked, it returns true which causes the walk break immediately, and other processors will never be checked.
Repace the value with AE_OK which is the standard acpi_status value. And don't abort the namespace walk even on error.
Fixes: 8c8cb30f49b8 (acpi/processor: Implement DEVICE operator for processor enumeration) Signed-off-by: Dou Liyang douly.fnst@cn.fujitsu.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/acpi/acpi_processor.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -643,7 +643,7 @@ static acpi_status __init acpi_processor
status = acpi_get_type(handle, &acpi_type); if (ACPI_FAILURE(status)) - return false; + return status;
switch (acpi_type) { case ACPI_TYPE_PROCESSOR: @@ -663,11 +663,12 @@ static acpi_status __init acpi_processor }
processor_validated_ids_update(uid); - return true; + return AE_OK;
err: + /* Exit on error, but don't abort the namespace walk */ acpi_handle_info(handle, "Invalid processor object\n"); - return false; + return AE_OK;
}