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Subject[PATCH] ACPI: glue: Use acpi_device_adr() in acpi_find_child_device()
Date
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Instead of evaluating _ADR in acpi_find_child_device(), use the
observation that it has already been evaluated and the value returned
by it has been stored in the pnp.type.bus_address field of the ACPI
device object at hand.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

Note that the patch at

https://patchwork.kernel.org/project/linux-acpi/patch/2223516.ElGaqSPkdT@kreacher/

will have an effect of this, so I'm going to prioritize the current patch
over the one above.

---
drivers/acpi/glue.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)

Index: linux-pm/drivers/acpi/glue.c
===================================================================
--- linux-pm.orig/drivers/acpi/glue.c
+++ linux-pm/drivers/acpi/glue.c
@@ -113,13 +113,10 @@ struct acpi_device *acpi_find_child_devi
return NULL;

list_for_each_entry(adev, &parent->children, node) {
- unsigned long long addr;
- acpi_status status;
+ acpi_bus_address addr = acpi_device_adr(adev);
int score;

- status = acpi_evaluate_integer(adev->handle, METHOD_NAME__ADR,
- NULL, &addr);
- if (ACPI_FAILURE(status) || addr != address)
+ if (!adev->pnp.type.bus_address || addr != address)
continue;

if (!ret) {


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