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Commit 6a88adf2 authored by Marcel Holtmann's avatar Marcel Holtmann
Browse files

Bluetooth: Add suspend/resume support to btusb driver 



During suspend it is important that all URBs are cancelled and then on
resume re-submitted. This gives initial suspend/resume support.

Based on initial work from Oliver Neukum <oneukum@suse.de>

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent a780efa8

drivers/bluetooth/btusb.c

+62 −0
Original line number Diff line number Diff line
@@ -198,6 +198,7 @@ struct btusb_data { 
	struct usb_endpoint_descriptor *isoc_rx_ep;



	int isoc_altsetting;

	int suspend_count;

};



static void btusb_intr_complete(struct urb *urb)
@@ -948,10 +949,71 @@ static void btusb_disconnect(struct usb_interface *intf) 
	hci_free_dev(hdev);

}



static int btusb_suspend(struct usb_interface *intf, pm_message_t message)

{

	struct btusb_data *data = usb_get_intfdata(intf);



	BT_DBG("intf %p", intf);



	if (data->suspend_count++)

		return 0;



	cancel_work_sync(&data->work);



	usb_kill_anchored_urbs(&data->tx_anchor);



	usb_kill_anchored_urbs(&data->isoc_anchor);

	usb_kill_anchored_urbs(&data->bulk_anchor);

	usb_kill_anchored_urbs(&data->intr_anchor);



	return 0;

}



static int btusb_resume(struct usb_interface *intf)

{

	struct btusb_data *data = usb_get_intfdata(intf);

	struct hci_dev *hdev = data->hdev;

	int err;



	BT_DBG("intf %p", intf);



	if (--data->suspend_count)

		return 0;



	if (!test_bit(HCI_RUNNING, &hdev->flags))

		return 0;



	if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {

		err = btusb_submit_intr_urb(hdev, GFP_NOIO);

		if (err < 0) {

			clear_bit(BTUSB_INTR_RUNNING, &data->flags);

			return err;

		}

	}



	if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {

		if (btusb_submit_bulk_urb(hdev, GFP_NOIO) < 0)

			clear_bit(BTUSB_BULK_RUNNING, &data->flags);

		else

			btusb_submit_bulk_urb(hdev, GFP_NOIO);

	}



	if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {

		if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)

			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);

		else

			btusb_submit_isoc_urb(hdev, GFP_NOIO);

	}



	return 0;

}



static struct usb_driver btusb_driver = {

	.name		= "btusb",

	.probe		= btusb_probe,

	.disconnect	= btusb_disconnect,

	.suspend	= btusb_suspend,

	.resume		= btusb_resume,

	.id_table	= btusb_table,

};