Return-Path: From: Leif Liddy To: linux-bluetooth@vger.kernel.org Cc: Leif Liddy Subject: [RFC PATCH v2] Bluetooth: btusb: fix QCA Rome suspend/resume Date: Sat, 8 Jul 2017 20:55:32 +0200 Message-Id: <20170708185532.26785-1-leif.linux@gmail.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: **update: sent with 'git send-email' 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 --- drivers/bluetooth/btusb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index fa24d69..0804a52 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3067,6 +3067,11 @@ 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 -- 2.9.4