[PATCH] HID: usbhid: enable remote wakeup for mouse

[huanglei814]

From: huanglei <huanglei@xxxxxxxxxx>

This patch enables remote wakeup by default for USB mouse
devices.  Mouse can used to be wakeup devices, but the correct
place to enable it depends on the device's bus; no single
approach will work for all mouse devices.  In particular, this
covers only USB mouse (and then only those supporting the boot
protocol).

Signed-off-by: huanglei <huanglei@xxxxxxxxxx>
---
 drivers/hid/usbhid/hid-core.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index a90ed2ceae84..7ed3ab36426d 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -1189,6 +1189,15 @@ static int usbhid_start(struct hid_device *hid)
 		device_set_wakeup_enable(&dev->dev, 1);
 	}
 
+	/* enable remote wakeup by default for all mouse
+	 * devices supporting the boot protocol.
+	 */
+	if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
+			interface->desc.bInterfaceProtocol ==
+				USB_INTERFACE_PROTOCOL_MOUSE) {
+		device_set_wakeup_enable(&dev->dev, 1);
+	}
+
 	mutex_unlock(&usbhid->mutex);
 	return 0;
 
-- 
2.17.1