From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65B95C3276C for ; Thu, 2 Jan 2020 22:27:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E5E02253D for ; Thu, 2 Jan 2020 22:27:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004050; bh=iPj0zluIWzyqWRoO57oi2l4TB1Hqdaa8CAffhmRVyYI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=I/Mn0M7nfzzlO0NmGkcF8NyE1pRFXrlVZ12/wiwy69r+bF9Ne5dzNyub12gvBTelr ne5yx82cCD94bohUAe90YcGtykMVMe0GV1TxC575sXeQke4bb+fGdC6zJW+oHP1goa jR7H8vwo/c3qoJa6HL9jpQFE+WQ7to2ORAAnu0Ao= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729747AbgABW13 (ORCPT ); Thu, 2 Jan 2020 17:27:29 -0500 Received: from mail.kernel.org ([198.145.29.99]:55868 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729737AbgABW10 (ORCPT ); Thu, 2 Jan 2020 17:27:26 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6FCF42253D; Thu, 2 Jan 2020 22:27:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004045; bh=iPj0zluIWzyqWRoO57oi2l4TB1Hqdaa8CAffhmRVyYI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=csbm6LuH9Zh8UIeN2Rv8suH0bQ4UHJU/Yksj1lsxiEMCVC+gPSWAUT9sBmmxIf+59 eS3cjnP9F0gc8040+kK3xJoIa1KsMMWTs8/SLqx2yQY2dAlGnQmE6pt2U1Bdm8M++q dNgWbV4/xbHwqqOWVBN58I2OE2e8a+ULERu7CTi8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Takashi Iwai Subject: [PATCH 4.9 006/171] ALSA: hda/ca0132 - Avoid endless loop Date: Thu, 2 Jan 2020 23:05:37 +0100 Message-Id: <20200102220547.819086859@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102220546.960200039@linuxfoundation.org> References: <20200102220546.960200039@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Takashi Iwai commit cb04fc3b6b076f67d228a0b7d096c69ad486c09c upstream. Introduce a timeout to dspio_clear_response_queue() so that it won't be caught in an endless loop even if the hardware doesn't respond properly. Fixes: a73d511c4867 ("ALSA: hda/ca0132: Add unsol handler for DSP and jack detection") Cc: Link: https://lore.kernel.org/r/20191213085111.22855-3-tiwai@suse.de Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/pci/hda/patch_ca0132.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/sound/pci/hda/patch_ca0132.c +++ b/sound/pci/hda/patch_ca0132.c @@ -1300,13 +1300,14 @@ struct scp_msg { static void dspio_clear_response_queue(struct hda_codec *codec) { + unsigned long timeout = jiffies + msecs_to_jiffies(1000); unsigned int dummy = 0; - int status = -1; + int status; /* clear all from the response queue */ do { status = dspio_read(codec, &dummy); - } while (status == 0); + } while (status == 0 && time_before(jiffies, timeout)); } static int dspio_get_response_data(struct hda_codec *codec)