From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751935AbdKSOdV (ORCPT ); Sun, 19 Nov 2017 09:33:21 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:52010 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751401AbdKSOdR (ORCPT ); Sun, 19 Nov 2017 09:33:17 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Leif Liddy , Marcel Holtmann , Kai Heng Feng Subject: [PATCH 4.4 11/59] Bluetooth: btusb: fix QCA Rome suspend/resume Date: Sun, 19 Nov 2017 15:32:19 +0100 Message-Id: <20171119143151.533759656@linuxfoundation.org> X-Mailer: git-send-email 2.15.0 In-Reply-To: <20171119143150.964013720@linuxfoundation.org> References: <20171119143150.964013720@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Leif Liddy 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 Signed-off-by: Marcel Holtmann Cc: Kai Heng Feng Signed-off-by: Greg Kroah-Hartman --- drivers/bluetooth/btusb.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2969,6 +2969,12 @@ 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