| From fd865802c66bc451dc515ed89360f84376ce1a56 Mon Sep 17 00:00:00 2001 |
| From: Leif Liddy <leif.linux@gmail.com> |
| Date: Sat, 8 Jul 2017 20:55:32 +0200 |
| Subject: Bluetooth: btusb: fix QCA Rome suspend/resume |
| |
| From: Leif Liddy <leif.linux@gmail.com> |
| |
| commit fd865802c66bc451dc515ed89360f84376ce1a56 upstream. |
| |
| 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> |
| Cc: Kai Heng Feng <kai.heng.feng@canonical.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/bluetooth/btusb.c | 6 ++++++ |
| 1 file changed, 6 insertions(+) |
| |
| --- a/drivers/bluetooth/btusb.c |
| +++ b/drivers/bluetooth/btusb.c |
| @@ -2925,6 +2925,12 @@ static int btusb_probe(struct usb_interf |
| 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 |
