Bluetooth: btusb: Implement hdev->prevent_wake

Implement the prevent_wake hook by checking device_may_wakeup on the usb
interface. This prevents the Bluetooth core from enabling scanning when
the device isn't expected to wake from suspend.

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 8ae3ad7a60131b53368e4cfb9cd63cc05418b68c..c17359c0e3201c4758fbcfbfd4238d52edcb02d3 100644 (file)
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3698,6 +3698,13 @@ static void btusb_check_needs_reset_resume(struct usb_interface *intf)
                interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
 }
 
+static bool btusb_prevent_wake(struct hci_dev *hdev)
+{
+       struct btusb_data *data = hci_get_drvdata(hdev);
+
+       return !device_may_wakeup(&data->udev->dev);
+}
+
 static int btusb_probe(struct usb_interface *intf,
                       const struct usb_device_id *id)
 {
@@ -3831,6 +3838,7 @@ static int btusb_probe(struct usb_interface *intf,
        hdev->flush  = btusb_flush;
        hdev->send   = btusb_send_frame;
        hdev->notify = btusb_notify;
+       hdev->prevent_wake = btusb_prevent_wake;
 
 #ifdef CONFIG_PM
        err = btusb_config_oob_wake(hdev);