ACPI / PCI / hotplug: Avoid warning when _ADR not present

acpiphp_enumerate_slots() walks ACPI namenamespace under
a PCI host bridge with callback register_slot().
register_slot() evaluates _ADR for all the device objects
and emits a warning message for any error.  Some platforms
have _HID device objects (such as HPET and IPMI), which
trigger unnecessary warning messages.

This patch avoids emitting a warning message when a target
device object does not have _ADR.

Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Cc: 3.12+ <stable@vger.kernel.org> # 3.12+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 1cf605f67673..438a4d09958b 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -279,7 +279,9 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
 
         status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
         if (ACPI_FAILURE(status)) {
-                acpi_handle_warn(handle, "can't evaluate _ADR (%#x)\n", status);
+                if (status != AE_NOT_FOUND)
+                        acpi_handle_warn(handle,
+                                "can't evaluate _ADR (%#x)\n", status);
                 return AE_OK;
         }