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 0DBA8C04AA5 for ; Thu, 25 Aug 2022 12:23:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241635AbiHYMXE (ORCPT ); Thu, 25 Aug 2022 08:23:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241454AbiHYMW7 (ORCPT ); Thu, 25 Aug 2022 08:22:59 -0400 Received: from mx0b-001ae601.pphosted.com (mx0a-001ae601.pphosted.com [67.231.149.25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9ACE0AE9ED for ; Thu, 25 Aug 2022 05:22:58 -0700 (PDT) Received: from pps.filterd (m0077473.ppops.net [127.0.0.1]) by mx0a-001ae601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 27P5nj9d003635; Thu, 25 Aug 2022 07:22:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=PODMain02222019; bh=F89FFReRi1zqDj//baBjB5HIEbobACoV3vAIIeNB3ec=; b=hZdnWo58dExaHs8WhdAWFx8hNyyvGy8ZRmqBNWX6Ja6iGhDzHPZimIZuHoAjfcG56gZo 5QzsBl2t8x13BruiFYft9FQHXkkba1PuA4HRJ2Q6qKKj64OiU9TVz0WoYWkQctBOLsrn f3S/2mLBMGltzUVcXxRTDZ/B6pHQe333GCg+lrXPLxdLOI1t3xOm/txUHEm1zeb+MEs2 NGc7D8dCMNhEEZfqBGo1AigbJKKG+qPu+ywB+GdvzHV8WTiHgPJM+xXSewNMzOhOUurB P5LxKySA55kvgH31fvT6qsgE4UGL6wTYc6phZMdXN+Fok0OkXcnNp1dx+maB6RNtHgAV gw== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0a-001ae601.pphosted.com (PPS) with ESMTPS id 3j4dgmbu3r-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 25 Aug 2022 07:22:44 -0500 Received: from ediex01.ad.cirrus.com (198.61.84.80) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.9; Thu, 25 Aug 2022 07:22:41 -0500 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by ediex01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server id 15.2.1118.9 via Frontend Transport; Thu, 25 Aug 2022 07:22:41 -0500 Received: from edi-sw-dsktp-006.ad.cirrus.com (edi-sw-dsktp-006.ad.cirrus.com [198.90.251.95]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id AAA18B16; Thu, 25 Aug 2022 12:22:41 +0000 (UTC) From: Richard Fitzgerald To: , , , CC: , , , Richard Fitzgerald Subject: [PATCH 2/3] soundwire: bus: Don't lose unattach notifications Date: Thu, 25 Aug 2022 13:22:40 +0100 Message-ID: <20220825122241.273090-3-rf@opensource.cirrus.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220825122241.273090-1-rf@opensource.cirrus.com> References: <20220825122241.273090-1-rf@opensource.cirrus.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Proofpoint-ORIG-GUID: R4M0MCMXsa_dW2vMEZQ1Wk1YwQqcZd6P X-Proofpoint-GUID: R4M0MCMXsa_dW2vMEZQ1Wk1YwQqcZd6P X-Proofpoint-Spam-Reason: safe Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ensure that if sdw_handle_slave_status() sees a peripheral has dropped off the bus it reports it to the client driver. If there are any devices reporting on address 0 it bails out after programming the device IDs. So it never reaches the second loop that calls sdw_update_slave_status(). If the missing device is one that is now showing as unenumerated it has been given a device ID so will report as attached next time sdw_handle_slave_status() runs. With the previous code the client driver would only see another ATTACHED notification because the UNATTACHED state was lost when sdw_handle_slave_status() bailed out after programming the device ID. This shows up most when the peripheral has to be reset after downloading updated firmware and there are multiple of these peripherals on the bus. They will all return to unenumerated state after the reset, and then there is a mix of unattached, attached and unenumerated PING states from the peripherals, as each is reset and they reboot. Signed-off-by: Richard Fitzgerald --- drivers/soundwire/bus.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 704f75c0bae2..bb8ce26c68b3 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -1756,6 +1756,11 @@ int sdw_handle_slave_status(struct sdw_bus *bus, dev_warn(&slave->dev, "Slave %d state check1: UNATTACHED, status was %d\n", i, slave->status); sdw_modify_slave_status(slave, SDW_SLAVE_UNATTACHED); + + /* Ensure driver knows that peripheral unattached */ + ret = sdw_update_slave_status(slave, status[i]); + if (ret < 0) + dev_warn(&slave->dev, "Update Slave status failed:%d\n", ret); } } -- 2.30.2