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 6BBA4C3F68F for ; Thu, 2 Jan 2020 22:34:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 386E8222C3 for ; Thu, 2 Jan 2020 22:34:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004486; bh=iPj0zluIWzyqWRoO57oi2l4TB1Hqdaa8CAffhmRVyYI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=17k/ySmpLtuHjjiER+9Ho1Vctid3O8NCILTaT+VcCQlwDEyg6mMd5f+bp9cI+qEnm O12lPspX4e50mSWFl+teCJu0VWQjnPYH9I14svmR42m2LRlXnekuJNO1qkgKuGnbRf LmIRnAAPcui6VhaeIYac2H8+X/c7fAKaCwSUB2sw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730716AbgABWeo (ORCPT ); Thu, 2 Jan 2020 17:34:44 -0500 Received: from mail.kernel.org ([198.145.29.99]:43538 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730247AbgABWek (ORCPT ); Thu, 2 Jan 2020 17:34:40 -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 E37FD222C3; Thu, 2 Jan 2020 22:34:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004480; bh=iPj0zluIWzyqWRoO57oi2l4TB1Hqdaa8CAffhmRVyYI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1LsM/EpNxU6oLoddAAYHEzBfAHf4QbGhz7XJCD4yRWji8phJnZrE364WLqQxKLULk Rqqe3iJJEbwFZ0OSQHFv5qaXL+lwryyHu50TDY+JMVhh609EfmgNimImurK3xDIOZ2 LTCAgWMlaYgFvOrZ8zxv29INUtf25fJION0WW3ls= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Takashi Iwai Subject: [PATCH 4.4 004/137] ALSA: hda/ca0132 - Avoid endless loop Date: Thu, 2 Jan 2020 23:06:17 +0100 Message-Id: <20200102220547.179018042@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102220546.618583146@linuxfoundation.org> References: <20200102220546.618583146@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)