Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753950AbaLOPDm (ORCPT ); Mon, 15 Dec 2014 10:03:42 -0500 Received: from youngberry.canonical.com ([91.189.89.112]:38472 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752435AbaLOO1x (ORCPT ); Mon, 15 Dec 2014 09:27:53 -0500 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Marcel Holtmann , Johan Hedberg , Luis Henriques Subject: [PATCH 3.16.y-ckt 059/168] Bluetooth: Handle Intel USB bootloader with buggy interrupt Date: Mon, 15 Dec 2014 14:25:13 +0000 Message-Id: <1418653622-21105-60-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 2.1.3 In-Reply-To: <1418653622-21105-1-git-send-email-luis.henriques@canonical.com> References: <1418653622-21105-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.16 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.7-ckt3 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Marcel Holtmann commit 3a5ef20c979c0f33b6fb2582d04957397a6bf51f upstream. The interrupt interface for the Intel USB bootloader devices is only enabled after receiving SetInterface(0, AltSetting=0). When this USB command is not send, then no HCI events will be received. Signed-off-by: Marcel Holtmann Signed-off-by: Johan Hedberg Signed-off-by: Luis Henriques --- drivers/bluetooth/btusb.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 1db4a6675151..9c63e20a46a4 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -1699,6 +1699,18 @@ static int btusb_probe(struct usb_interface *intf, data->isoc = NULL; } + if (id->driver_info & BTUSB_INTEL_BOOT) { + /* A bug in the bootloader causes that interrupt interface is + * only enabled after receiving SetInterface(0, AltSetting=0). + */ + err = usb_set_interface(data->udev, 0, 0); + if (err < 0) { + BT_ERR("failed to set interface 0, alt 0 %d", err); + hci_free_dev(hdev); + return err; + } + } + if (data->isoc) { err = usb_driver_claim_interface(&btusb_driver, data->isoc, data); -- 2.1.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/