From patchwork Wed Oct 23 21:06:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre-Louis Bossart X-Patchwork-Id: 11207699 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DF49714E5 for ; Wed, 23 Oct 2019 21:08:08 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E91C32064A for ; Wed, 23 Oct 2019 21:08:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="ub9H0IjC" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E91C32064A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 8F97E15E0; Wed, 23 Oct 2019 23:07:15 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 8F97E15E0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1571864885; bh=D6ScurYIl/LTj//TqSYULlNI5J9qCoUEVTb7QT8vhqI=; h=From:To:Date:In-Reply-To:References:Cc:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=ub9H0IjCJHUkHsh0TUDKABEm5xM3bGc+EEiYnDZlYkPG/qR8OTYgmlU7HewV8tox+ DvKhBNFVHZaRjaVom2tTbwC4HrHN2qjRqWTppB3dtSfl9m08C4YTGd53BpDvpq/lt+ F0ku+2yQaBVYSvKuQPbYBm8UoFUs4oZxVxM50V+Y= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 1FCD0F8036F; Wed, 23 Oct 2019 23:07:15 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id E386AF803A6; Wed, 23 Oct 2019 23:07:13 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=SPF_HELO_NONE,SPF_NONE, SURBL_BLOCKED,URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id AE3F6F80112 for ; Wed, 23 Oct 2019 23:07:10 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz AE3F6F80112 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Oct 2019 14:07:07 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,222,1569308400"; d="scan'208";a="201260293" Received: from ayamada-mobl1.gar.corp.intel.com (HELO pbossart-mobl3.intel.com) ([10.254.95.208]) by orsmga003.jf.intel.com with ESMTP; 23 Oct 2019 14:07:05 -0700 From: Pierre-Louis Bossart To: alsa-devel@alsa-project.org Date: Wed, 23 Oct 2019 16:06:54 -0500 Message-Id: <20191023210657.32440-2-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191023210657.32440-1-pierre-louis.bossart@linux.intel.com> References: <20191023210657.32440-1-pierre-louis.bossart@linux.intel.com> MIME-Version: 1.0 Cc: Pierre-Louis Bossart , tiwai@suse.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, Ranjani Sridharan , vkoul@kernel.org, broonie@kernel.org, srinivas.kandagatla@linaro.org, jank@cadence.com, slawomir.blauciak@intel.com, Sanyog Kale , Bard liao , Rander Wang Subject: [alsa-devel] [PATCH 1/4] soundwire: sdw_slave: add new fields to track probe status X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Changes to the sdw_slave structure needed to solve race conditions on driver probe. The functionality is added in the next patch. Signed-off-by: Pierre-Louis Bossart --- include/linux/soundwire/sdw.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 688b40e65c89..a381a596212b 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -545,6 +545,10 @@ struct sdw_slave_ops { * @node: node for bus list * @port_ready: Port ready completion flag for each Slave port * @dev_num: Device Number assigned by Bus + * @probed: boolean tracking driver state + * @probe_complete: completion utility to control potential races + * on startup between driver probe/initialization and SoundWire + * Slave state changes/imp-def interrupts */ struct sdw_slave { struct sdw_slave_id id; @@ -559,6 +563,8 @@ struct sdw_slave { struct list_head node; struct completion *port_ready; u16 dev_num; + bool probed; + struct completion probe_complete; }; #define dev_to_sdw_dev(_dev) container_of(_dev, struct sdw_slave, dev)