diff options
| -rw-r--r-- | drivers/pci/pci-acpi.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index c580a525d9c..736bb248008 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -210,6 +210,10 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags) goto out; } + /* No need to evaluate _OSC if the control was already granted. */ + if ((osc_data->control_set & ctrlset) == ctrlset) + goto out; + if (!osc_data->is_queried) { status = __acpi_query_osc(osc_data->support_set, osc_data); if (ACPI_FAILURE(status)) |