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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5E365C433F5 for ; Thu, 10 Feb 2022 13:49:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242432AbiBJNs6 (ORCPT ); Thu, 10 Feb 2022 08:48:58 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:48772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233034AbiBJNs4 (ORCPT ); Thu, 10 Feb 2022 08:48:56 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E6A4191 for ; Thu, 10 Feb 2022 05:48:58 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id C9ABFB82557 for ; Thu, 10 Feb 2022 13:48:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D30CFC004E1; Thu, 10 Feb 2022 13:48:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1644500935; bh=QI5LDB2KPQTsI0Rf8cfbWacWSB1sk8X6zQXAsK+3whk=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=dFBZodrbTVhElVqc2vFBBsPARCCo5mBBJX6FR2cvh9qqZIk3XZvF0axuJzDyhYR2c 2vjzZSsyS0DBW48d8vD0JL0o0LXB5YYXBQwV+VwTM5FWlb24FR3tW9aFgsoR32VLIk A4uSWtOSCRkJvCN41sAjUzXtilYmAdJ//FI1lvC/OBnBM8weHxaGhKL6S43JZd38dj wMvV6k2l5OstMy3gelb+0grLRZ3IKSxz4WTukDolpMysbLGBPiheTFZ8cKX/14ax5e lbBsJGchIN9G7HxA3CPXbi+H77OnwWc+mCkcK38TpajDolsBo6Tw7unyuBpWxt1Pbr 6BFFrIK+kd/oA== Date: Thu, 10 Feb 2022 19:18:51 +0530 From: Vinod Koul To: Bard Liao Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, srinivas.kandagatla@linaro.org, pierre-louis.bossart@linux.intel.com, sanyog.r.kale@intel.com, bard.liao@intel.com Subject: Re: [PATCH] soundwire: bus: add dev_warn() messages to track UNATTACHED devices Message-ID: References: <20220126011527.27930-1-yung-chuan.liao@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220126011527.27930-1-yung-chuan.liao@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 26-01-22, 09:15, Bard Liao wrote: > From: Pierre-Louis Bossart > > In rare cases, some devices seem to lose sync and never re-attach on > the bus. This seems to happen only when there are more than one device > per link, which suggests either an electrical issue, a race condition > or a state machine issue. > > Add two dev_warn() messages to identify the sequence by which the > devices become UNATTACHED. Applied, thanks -- ~Vinod