[PATCH 4.19 88/96] ACPI: processor: Return an error if acpi_processor_get_info() fails in processor_add()

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4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

[ Upstream commit fadf231f0a06a6748a7fc4a2c29ac9ef7bca6bfd ]

Rafael observed [1] that returning 0 from processor_add() will result in
acpi_default_enumeration() being called which will attempt to create a
platform device, but that makes little sense when the processor is known
to be not available.  So just return the error code from acpi_processor_get_info()
instead.

Link: https://lore.kernel.org/all/CAJZ5v0iKU8ra9jR+EmgxbuNm=Uwx2m1-8vn_RAZ+aCiUVLe3Pw@xxxxxxxxxxxxxx/ [1]
Suggested-by: Rafael J. Wysocki <rafael@xxxxxxxxxx>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240529133446.28446-5-Jonathan.Cameron@xxxxxxxxxx
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/acpi/acpi_processor.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index a448cdf56718..9726516abdd5 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -391,7 +391,7 @@ static int acpi_processor_add(struct acpi_device *device,
 
 	result = acpi_processor_get_info(device);
 	if (result) /* Processor is not physically present or unavailable */
-		return 0;
+		return result;
 
 	BUG_ON(pr->id >= nr_cpu_ids);
 
-- 
2.43.0







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