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>

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index b1e01b057a7cfe10701a217c6f3dab46296b65b1..0d533b258aa61e35796a2d29ab717f07ffe0fd5f 100644 (file)
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -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