platform/x86: toshiba: re-enable acpi hotkeys after suspend to disk

On the Toshiba Tecra Z40, after a suspend-to-disk, some FN hotkeys
driven by toshiba_acpi are not functional.

Calling the ACPI object ENAB on resume makes them back alive.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Matthew Garrett <matthew.garrett@nebula.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index b062d3d7b373..ba75701986e5 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -1857,9 +1857,16 @@ static int toshiba_acpi_resume(struct device *device)
 {
         struct toshiba_acpi_dev *dev = acpi_driver_data(to_acpi_device(device));
         u32 result;
+        acpi_status status;
+
+        if (dev->hotkey_dev) {
+                status = acpi_evaluate_object(dev->acpi_dev->handle, "ENAB",
+                                NULL, NULL);
+                if (ACPI_FAILURE(status))
+                        pr_info("Unable to re-enable hotkeys\n");
 
-        if (dev->hotkey_dev)
                 hci_write1(dev, HCI_HOTKEY_EVENT, HCI_HOTKEY_ENABLE, &result);
+        }
 
         return 0;
 }