Add debug output for adding an ACPI device. Enable this with
"acpi.debug_layer=0x00010000" (ACPI_BUS_COMPONENT).
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx>
---
drivers/acpi/scan.c | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 408ebde..75b7c57 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1230,6 +1230,7 @@ acpi_add_single_object(struct acpi_device **child,
{
int result = 0;
struct acpi_device *device = NULL;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
if (!child)
@@ -1355,9 +1356,16 @@ acpi_add_single_object(struct acpi_device **child,
}
end:
- if (!result)
+ if (!result) {
+ acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Adding %s [%s] parent %s\n", dev_name(&device->dev),
+ (char *) buffer.pointer,
+ device->parent ? dev_name(&device->parent->dev) :
+ "(null)"));
+ kfree(buffer.pointer);
*child = device;
- else
+ } else
acpi_device_release(&device->dev);
return result;
--
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