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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 29557C2BB40 for ; Wed, 9 Dec 2020 05:37:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 00A6623AFE for ; Wed, 9 Dec 2020 05:37:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727744AbgLIFhE (ORCPT ); Wed, 9 Dec 2020 00:37:04 -0500 Received: from mga04.intel.com ([192.55.52.120]:56120 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727710AbgLIFhC (ORCPT ); Wed, 9 Dec 2020 00:37:02 -0500 IronPort-SDR: q2qOMDiHDJIDwotvBImALGdnRussOQ1To4t5NcQ9tkASdLIp9ibMZdcnFFstbNP3c60c2Ic9Iu MMmy+E3vfPpw== X-IronPort-AV: E=McAfee;i="6000,8403,9829"; a="171449621" X-IronPort-AV: E=Sophos;i="5.78,404,1599548400"; d="scan'208";a="171449621" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Dec 2020 21:35:17 -0800 IronPort-SDR: jJERFyK7Nsgxgl905jvdSfwvuUwiXXLzRy7WwhNiENmlEd/4/cCWLdMNDFc8HQrz+v0rLW5yo4 R45crUGP1Ukw== X-IronPort-AV: E=Sophos;i="5.78,404,1599548400"; d="scan'208";a="363989427" 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 21:35:13 -0800 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com, srinivas.kandagatla@linaro.org, rander.wang@linux.intel.com, ranjani.sridharan@linux.intel.com, hui.wang@canonical.com, pierre-louis.bossart@linux.intel.com, sanyog.r.kale@intel.com, bard.liao@intel.com Subject: [PATCH v2 2/9] soundwire: bus: use sdw_write_no_pm when setting the bus scale registers Date: Wed, 9 Dec 2020 13:34:52 +0800 Message-Id: <20201209053459.5515-3-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> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. This patch fixes the same problem as the previous one, but is split to make the life of linux-stable maintainers less painful. Fixes: 29d158f90690 ('soundwire: bus: initialize bus clock base and scale registers') Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao --- drivers/soundwire/bus.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 60c42508c6c6..b1830032b052 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -1222,7 +1222,7 @@ static int sdw_slave_set_frequency(struct sdw_slave *slave) } scale_index++; - ret = sdw_write(slave, SDW_SCP_BUS_CLOCK_BASE, base); + ret = sdw_write_no_pm(slave, SDW_SCP_BUS_CLOCK_BASE, base); if (ret < 0) { dev_err(&slave->dev, "SDW_SCP_BUS_CLOCK_BASE write failed:%d\n", ret); @@ -1230,13 +1230,13 @@ static int sdw_slave_set_frequency(struct sdw_slave *slave) } /* initialize scale for both banks */ - ret = sdw_write(slave, SDW_SCP_BUSCLOCK_SCALE_B0, scale_index); + ret = sdw_write_no_pm(slave, SDW_SCP_BUSCLOCK_SCALE_B0, scale_index); if (ret < 0) { dev_err(&slave->dev, "SDW_SCP_BUSCLOCK_SCALE_B0 write failed:%d\n", ret); return ret; } - ret = sdw_write(slave, SDW_SCP_BUSCLOCK_SCALE_B1, scale_index); + ret = sdw_write_no_pm(slave, SDW_SCP_BUSCLOCK_SCALE_B1, scale_index); if (ret < 0) dev_err(&slave->dev, "SDW_SCP_BUSCLOCK_SCALE_B1 write failed:%d\n", ret); -- 2.17.1