[PATCH] spi: Fix ACPI SPI resources using relative path

[Alban Bedel]

ACPI resources can use relative path when pointing to other
resources. This didn't work with SPISerialBus resources because the
device defining the resource was not passed to acpi_get_handle().

Pass the ACPI device handle through the lookup context to also allow
for relative paths.

Signed-off-by: Alban Bedel <alban.bedel@xxxxxxxxxx>
---
 drivers/spi/spi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 5b5b3bc5f0d8c..30ef9216f3a49 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2983,6 +2983,7 @@ EXPORT_SYMBOL_GPL(devm_spi_new_ancillary_device);
 #ifdef CONFIG_ACPI
 struct acpi_spi_lookup {
 	struct spi_controller 	*ctlr;
+	acpi_handle		device_handle;
 	u32			max_speed_hz;
 	u32			mode;
 	int			irq;
@@ -3077,7 +3078,7 @@ static int acpi_spi_add_resource(struct acpi_resource *ares, void *data)
 			if (lookup->index != -1 && lookup->n++ != lookup->index)
 				return 1;
 
-			status = acpi_get_handle(NULL,
+			status = acpi_get_handle(lookup->device_handle,
 						 sb->resource_source.string_ptr,
 						 &parent_handle);
 
@@ -3169,6 +3170,7 @@ struct spi_device *acpi_spi_device_alloc(struct spi_controller *ctlr,
 		return ERR_PTR(-EINVAL);
 
 	lookup.ctlr		= ctlr;
+	lookup.device_handle	= acpi_device_handle(adev);
 	lookup.irq		= -1;
 	lookup.index		= index;
 	lookup.n		= 0;
-- 
2.39.5