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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 555C3C38A2D for ; Thu, 27 Oct 2022 08:43:33 +0000 (UTC) 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 C96823104; Thu, 27 Oct 2022 10:42:40 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz C96823104 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1666860210; bh=CQw/1XgA6G4VkvWR6lQp1wcqpNwHVYgmKcAXoblQn0s=; h=From:To:Subject:Date:Cc:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=HrUfbGSi3JcXwKyp8y/9sHspJxelc+SJx/zhjOoa+ab5th3+YriR0fNNsLrXEaNXA Z5kvoktqTCvhy/zBfCzhOJW7SgsqPKVtpsJz0KDLgothqpJJ0NW508X2cIyBjgQHQW ++lGcTbcuXJS6lWpq25BXS8OU0hYjTd6OGhwcgc4= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 597AFF80100; Thu, 27 Oct 2022 10:42:40 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id D98F1F8025E; Thu, 27 Oct 2022 10:42:38 +0200 (CEST) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) (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 E7FFAF80100 for ; Thu, 27 Oct 2022 10:42:33 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz E7FFAF80100 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="J4bu8zXF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1666860155; x=1698396155; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=CQw/1XgA6G4VkvWR6lQp1wcqpNwHVYgmKcAXoblQn0s=; b=J4bu8zXF+6tozGZYyer1JMphuD4XpVgl9uU1RPMVynefEqSTwZ62nE4S TBtQuKE8Biq6MToPs0lzePo7TmxkMyAwi+0yPM1kWqXoyrrQesV5NcqsW JNtmyyLFBfeyvcIs9t5GeZpUOAWP16j49/3MscZaRMy0LmzBXclLCcLdz mS8G1fgQdl8yKTIr97vwD+rdRRL/J2OUpP7rhzPEyL13rUFwCiYa+K9gH V7b7mJ+GkjXiMKEKcxH6sKCt2jkOKPqIYcE/DOMKNWZxBDobP9VaJ/jC4 /z1lHPXMLm6+cn6wTUFthYvBCBed+ICgVdyyrjIASu8ULeMiphCHbaDRg g==; X-IronPort-AV: E=McAfee;i="6500,9779,10512"; a="334795898" X-IronPort-AV: E=Sophos;i="5.95,217,1661842800"; d="scan'208";a="334795898" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2022 01:42:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10512"; a="632328094" X-IronPort-AV: E=Sophos;i="5.95,217,1661842800"; d="scan'208";a="632328094" Received: from crojewsk-ctrl.igk.intel.com ([10.102.9.28]) by orsmga002.jf.intel.com with ESMTP; 27 Oct 2022 01:41:59 -0700 From: Cezary Rojewski To: alsa-devel@alsa-project.org, broonie@kernel.org Subject: [RESEND PATCH] ASoC: core: Exit all links before removing their components Date: Thu, 27 Oct 2022 10:58:40 +0200 Message-Id: <20221027085840.1562698-1-cezary.rojewski@intel.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Cezary Rojewski , pierre-louis.bossart@linux.intel.com, tiwai@suse.com, hdegoede@redhat.com, amadeuszx.slawinski@linux.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" Flows leading to link->init() and link->exit() are not symmetric. Currently the relevant part of card probe sequence goes as: for_each_card_rtds(card, rtd) for_each_rtd_components(rtd, i, component) component->probe() for_each_card_rtds(card, rtd) for_each_rtd_dais(rtd, i, dai) dai->probe() for_each_card_rtds(card, rtd) rtd->init() On the other side, equivalent remove sequence goes as: for_each_card_rtds(card, rtd) for_each_rtd_dais(rtd, i, dai) dai->remove() for_each_card_rtds(card, rtd) for_each_rtd_components(rtd, i, component) component->remove() for_each_card_rtds(card, rtd) rtd->exit() what can lead to errors as link->exit() may still operate on resources owned by its components despite the probability of them being freed during the component->remove(). This change modifies the remove sequence to: for_each_card_rtds(card, rtd) rtd->exit() for_each_card_rtds(card, rtd) for_each_rtd_dais(rtd, i, dai) dai->remove() for_each_card_rtds(card, rtd) for_each_rtd_components(rtd, i, component) component->remove() so code found in link->exit() is safe to touch any component stuff as component->remove() has not been called yet. Signed-off-by: Cezary Rojewski Reviewed-by: Amadeusz Sławiński --- Original review for v1: https://lore.kernel.org/alsa-devel/20220621115758.3154933-1-cezary.rojewski@intel.com/ sound/soc/soc-core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 4a3fca50a536..638e781df3b0 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -935,9 +935,6 @@ void snd_soc_remove_pcm_runtime(struct snd_soc_card *card, { lockdep_assert_held(&client_mutex); - /* release machine specific resources */ - snd_soc_link_exit(rtd); - /* * Notify the machine driver for extra destruction */ @@ -1888,6 +1885,9 @@ static void soc_cleanup_card_resources(struct snd_soc_card *card) snd_soc_dapm_shutdown(card); + /* release machine specific resources */ + for_each_card_rtds(card, rtd) + snd_soc_link_exit(rtd); /* remove and free each DAI */ soc_remove_link_dais(card); soc_remove_link_components(card); -- 2.25.1