PCI hotplug: fix oshp evaluation

If firmware doesn't grant over native hotplug control through ACPI
_OSC method, we must not evaluate OSHP.

Acked-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c
index a73028ec52e5..6833d7bdbbff 100644
--- a/drivers/pci/hotplug/acpi_pcihp.c
+++ b/drivers/pci/hotplug/acpi_pcihp.c
@@ -362,6 +362,8 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags)
                 status = acpi_pci_osc_control_set(handle, flags);
                 if (ACPI_SUCCESS(status))
                         goto got_one;
+                if (status == AE_SUPPORT)
+                        goto no_control;
                 kfree(string.pointer);
                 string = (struct acpi_buffer){ ACPI_ALLOCATE_BUFFER, NULL };
         }
@@ -394,10 +396,9 @@ int acpi_get_hp_hw_control_from_firmware(struct pci_dev *pdev, u32 flags)
                 if (ACPI_FAILURE(status))
                         break;
         }
-
+no_control:
         dbg("Cannot get control of hotplug hardware for pci %s\n",
             pci_name(pdev));
-
         kfree(string.pointer);
         return -ENODEV;
 got_one: