[PATCH AUTOSEL 4.14 19/73] ACPI / processor: Fix the return value of acpi_processor_ids_walk()

From: Sasha Levin
Date: Wed Oct 31 2018 - 19:27:57 EST

From: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>

[ 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@xxxxxxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/acpi/acpi_processor.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 86c10599d9f8..ccf07674a2a0 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -642,7 +642,7 @@ static acpi_status __init acpi_processor_ids_walk(acpi_handle handle,

status = acpi_get_type(handle, &acpi_type);
if (ACPI_FAILURE(status))
- return false;
+ return status;

switch (acpi_type) {
@@ -662,11 +662,12 @@ static acpi_status __init acpi_processor_ids_walk(acpi_handle handle,

- return true;
+ return AE_OK;

+ /* Exit on error, but don't abort the namespace walk */
acpi_handle_info(handle, "Invalid processor object\n");
- return false;
+ return AE_OK;