From patchwork Wed Dec 9 05:34:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 11960421 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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 F3692C433FE for ; Wed, 9 Dec 2020 05:37:04 +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 3A5EE23AFE for ; Wed, 9 Dec 2020 05:37:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3A5EE23AFE 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 6FF5616E2; Wed, 9 Dec 2020 06:36:12 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 6FF5616E2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1607492222; bh=OZCBQj/XfIa+hOVtqTht3UC9AbcvYIeEBqVCgwp+8t4=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=Y4l5Qb6CBXnjhm4xe//C1DQr47QEK4ekCPEjTPi2hHzCRLQ4v1czIFh7YYL4yh1Q9 Hk0KbHr//GgqP4cy01vAiT8wYE/ruGykN8yT5RqLXTXBl6ri/vB0muM0T/dBvWFL2C OXOXnogVU4bn6XH9XBD++RBdZCs3doFC3uBXzRWg= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 3353AF800EF; Wed, 9 Dec 2020 06:35:26 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 0184DF8026A; Wed, 9 Dec 2020 06:35:23 +0100 (CET) Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) (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 18A87F800E1 for ; Wed, 9 Dec 2020 06:35:16 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 18A87F800E1 IronPort-SDR: xQQmQXKmoZVJyMi0Y0cU4JXCXIdKCThpr4oN05+3AenYtdlGkyDgP9zpDBeA8lSCi9kf1WiBYw tbbPl62KVnGQ== X-IronPort-AV: E=McAfee;i="6000,8403,9829"; a="153258984" X-IronPort-AV: E=Sophos;i="5.78,404,1599548400"; d="scan'208";a="153258984" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Dec 2020 21:35:13 -0800 IronPort-SDR: SqsF4JCaPhSGxeewJv150yNVO2p5IcnHlRUSn/pOnl6ZazRIJy7vhVEpjIcZybrrV8SVbBnNdi oWzrAfY3r5/g== X-IronPort-AV: E=Sophos;i="5.78,404,1599548400"; d="scan'208";a="363989388" Received: from bard-ubuntu.sh.intel.com ([10.239.13.33]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Dec 2020 21:35:09 -0800 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH v2 1/9] soundwire: bus: use sdw_update_no_pm when initializing a device Date: Wed, 9 Dec 2020 13:34:51 +0800 Message-Id: <20201209053459.5515-2-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201209053459.5515-1-yung-chuan.liao@linux.intel.com> References: <20201209053459.5515-1-yung-chuan.liao@linux.intel.com> Cc: pierre-louis.bossart@linux.intel.com, vinod.koul@linaro.org, tiwai@suse.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, ranjani.sridharan@linux.intel.com, hui.wang@canonical.com, broonie@kernel.org, srinivas.kandagatla@linaro.org, jank@cadence.com, sanyog.r.kale@intel.com, rander.wang@linux.intel.com, bard.liao@intel.com 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" From: Pierre-Louis Bossart When a Slave device is resumed, it may resume the bus and restart the enumeration. During that process, we absolutely don't want to call regular read/write routines which will wait for the resume to complete, otherwise a deadlock occurs. Fixes: 60ee9be25571 ('soundwire: bus: add PM/no-PM versions of read/write functions') Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao --- drivers/soundwire/bus.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index d1e8c3a54976..60c42508c6c6 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -489,6 +489,18 @@ sdw_read_no_pm(struct sdw_slave *slave, u32 addr) return buf; } +static int sdw_update_no_pm(struct sdw_slave *slave, u32 addr, u8 mask, u8 val) +{ + int tmp; + + tmp = sdw_read_no_pm(slave, addr); + if (tmp < 0) + return tmp; + + tmp = (tmp & ~mask) | val; + return sdw_write_no_pm(slave, addr, tmp); +} + /** * sdw_nread() - Read "n" contiguous SDW Slave registers * @slave: SDW Slave @@ -1256,7 +1268,7 @@ static int sdw_initialize_slave(struct sdw_slave *slave) val = slave->prop.scp_int1_mask; /* Enable SCP interrupts */ - ret = sdw_update(slave, SDW_SCP_INTMASK1, val, val); + ret = sdw_update_no_pm(slave, SDW_SCP_INTMASK1, val, val); if (ret < 0) { dev_err(slave->bus->dev, "SDW_SCP_INTMASK1 write failed:%d\n", ret); @@ -1271,7 +1283,7 @@ static int sdw_initialize_slave(struct sdw_slave *slave) val = prop->dp0_prop->imp_def_interrupts; val |= SDW_DP0_INT_PORT_READY | SDW_DP0_INT_BRA_FAILURE; - ret = sdw_update(slave, SDW_DP0_INTMASK, val, val); + ret = sdw_update_no_pm(slave, SDW_DP0_INTMASK, val, val); if (ret < 0) dev_err(slave->bus->dev, "SDW_DP0_INTMASK read failed:%d\n", ret);