From: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Date: Tue, 2 Sep 2014 18:04:19 +0000 (-0400)
Subject: platform/x86: toshiba: re-enable acpi hotkeys after suspend to disk
X-Git-Tag: v4.13~6729^2~1
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=e7fdb762b9e1e10c3271e47723b2003330829ddf;p=mirror_ubuntu-bionic-kernel.git

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>
---

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;
 }