Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753134AbdGMP4y (ORCPT ); Thu, 13 Jul 2017 11:56:54 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:38718 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753201AbdGMPoG (ORCPT ); Thu, 13 Jul 2017 11:44:06 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Devin Heitmueller Subject: [PATCH 4.4 10/57] Add USB quirk for HVR-950q to avoid intermittent device resets Date: Thu, 13 Jul 2017 17:42:25 +0200 Message-Id: <20170713153958.253723851@linuxfoundation.org> X-Mailer: git-send-email 2.13.2 In-Reply-To: <20170713153957.515045341@linuxfoundation.org> References: <20170713153957.515045341@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 Content-Length: 1422 Lines: 40 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Devin Heitmueller commit 6836796de4019944f4ba4c99a360e8250fd2e735 upstream. The USB core and sysfs will attempt to enumerate certain parameters which are unsupported by the au0828 - causing inconsistent behavior and sometimes causing the chip to reset. Avoid making these calls. This problem manifested as intermittent cases where the au8522 would be reset on analog video startup, in particular when starting up ALSA audio streaming in parallel - the sysfs entries created by snd-usb-audio on streaming startup would result in unsupported control messages being sent during tuning which would put the chip into an unknown state. Signed-off-by: Devin Heitmueller Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/quirks.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -223,6 +223,10 @@ static const struct usb_device_id usb_qu /* Blackmagic Design UltraStudio SDI */ { USB_DEVICE(0x1edb, 0xbd4f), .driver_info = USB_QUIRK_NO_LPM }, + /* Hauppauge HVR-950q */ + { USB_DEVICE(0x2040, 0x7200), .driver_info = + USB_QUIRK_CONFIG_INTF_STRINGS }, + /* INTEL VALUE SSD */ { USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },