Commit fd865802 authored Jul 08, 2017 by Leif Liddy Committed by Marcel Holtmann Jul 20, 2017

Bluetooth: btusb: fix QCA Rome suspend/resume



There's been numerous reported instances where BTUSB_QCA_ROME
bluetooth controllers stop functioning upon resume from suspend. These
devices seem to be losing power during suspend. Patch will detect a status
change on resume and perform a reset.

Signed-off-by: Leif Liddy <leif.linux@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

parent a529df82

drivers/bluetooth/btusb.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -3068,6 +3068,12 @@ static int btusb_probe(struct usb_interface *intf,
		if (id->driver_info & BTUSB_QCA_ROME) {
		data->setup_on_usb = btusb_setup_qca;
		hdev->set_bdaddr = btusb_set_bdaddr_ath3012;

		/* QCA Rome devices lose their updated firmware over suspend,
		* but the USB hub doesn't notice any status change.
		* Explicitly request a device reset on resume.
		*/
		set_bit(BTUSB_RESET_RESUME, &data->flags);
		}

		#ifdef CONFIG_BT_HCIBTUSB_RTL