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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 E05A9C5DF63 for ; Wed, 6 Nov 2019 19:22:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BA63D217F9 for ; Wed, 6 Nov 2019 19:22:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732427AbfKFTWt (ORCPT ); Wed, 6 Nov 2019 14:22:49 -0500 Received: from mga02.intel.com ([134.134.136.20]:50608 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732348AbfKFTWp (ORCPT ); Wed, 6 Nov 2019 14:22:45 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Nov 2019 11:22:45 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,275,1569308400"; d="scan'208";a="403835136" Received: from vidhipat-mobl1.amr.corp.intel.com (HELO pbossart-mobl3.amr.corp.intel.com) ([10.254.33.70]) by fmsmga006.fm.intel.com with ESMTP; 06 Nov 2019 11:22:43 -0800 From: Pierre-Louis Bossart To: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org, vkoul@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com, srinivas.kandagatla@linaro.org, slawomir.blauciak@intel.com, Bard liao , Rander Wang , Ranjani Sridharan , Pierre-Louis Bossart , Sanyog Kale Subject: [PATCH v2 11/19] soundwire: bus: check first if Slaves become UNATTACHED Date: Wed, 6 Nov 2019 13:22:15 -0600 Message-Id: <20191106192223.6003-12-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191106192223.6003-1-pierre-louis.bossart@linux.intel.com> References: <20191106192223.6003-1-pierre-louis.bossart@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Before checking for the presence of Device0, we first need to clean-up the internal state of Slaves that are no longer attached. Signed-off-by: Pierre-Louis Bossart --- drivers/soundwire/bus.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 17c744c0ff4c..65521c2ed2e1 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -1033,6 +1033,24 @@ int sdw_handle_slave_status(struct sdw_bus *bus, struct sdw_slave *slave; int i, ret = 0; + /* first check if any Slaves fell off the bus */ + for (i = 1; i <= SDW_MAX_DEVICES; i++) { + mutex_lock(&bus->bus_lock); + if (test_bit(i, bus->assigned) == false) { + mutex_unlock(&bus->bus_lock); + continue; + } + mutex_unlock(&bus->bus_lock); + + slave = sdw_get_slave(bus, i); + if (!slave) + continue; + + if (status[i] == SDW_SLAVE_UNATTACHED && + slave->status != SDW_SLAVE_UNATTACHED) + sdw_modify_slave_status(slave, SDW_SLAVE_UNATTACHED); + } + if (status[0] == SDW_SLAVE_ATTACHED) { dev_dbg(bus->dev, "Slave attached, programming device number\n"); ret = sdw_program_device_num(bus); -- 2.20.1