From patchwork Sun Nov 29 11:41:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cezary Rojewski X-Patchwork-Id: 334473 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=-16.8 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,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 694ECC3E8C5 for ; Sun, 29 Nov 2020 11:46:45 +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 89676206DF for ; Sun, 29 Nov 2020 11:46:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="C7B6x8Kp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 89676206DF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=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 2AB191896; Sun, 29 Nov 2020 12:45:53 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 2AB191896 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1606650403; bh=75FpB/AZCwdv4NpvD+TfRl63Z4tdmEpBkVWhz4TI80M=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=C7B6x8Kpj/Q3eE1XpN9izRVFjBTC3NsPMKp2zkb395VPTUQVWxfjjWBmQW0S963/Q clM/CG3Rak9Pwn9F9+gsQJIk0aaBLyGWETgHutbKGlJO+hndyt0Hwtfrnl4nkOe/Xn X0MC7ALWsvzfb7cvMf5BMCL+4tnGw+CKmTynVo5I= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 54BFBF804E2; Sun, 29 Nov 2020 12:43:37 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id E73C1F804C2; Sun, 29 Nov 2020 12:43:27 +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 3246BF8016D for ; Sun, 29 Nov 2020 12:43:14 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 3246BF8016D IronPort-SDR: +mwHlyhktjGDyAI8AY6yT0ctwUwV5fHLbU3PuzhzBvzhwmKOs4dwnuuYOhnTgEfFohOfITQdd/ 33VYWpfk8ZlQ== X-IronPort-AV: E=McAfee;i="6000,8403,9819"; a="151779975" X-IronPort-AV: E=Sophos;i="5.78,379,1599548400"; d="scan'208";a="151779975" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Nov 2020 03:43:12 -0800 IronPort-SDR: UTqLxCcKQjJf0OjHSzZEOo4sFVs3Ra0eGlQ+wvvPkSSnH2HSOKT5PqlNILnA6cBC0giRSdb+Pb +xdXcCFFZ9Fw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.78,379,1599548400"; d="scan'208";a="480261645" Received: from crojewsk-ctrl.igk.intel.com ([10.102.9.28]) by orsmga004.jf.intel.com with ESMTP; 29 Nov 2020 03:43:10 -0800 From: Cezary Rojewski To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/8] ASoC: Intel: Skylake: Shield against no-NHLT configurations Date: Sun, 29 Nov 2020 12:41:44 +0100 Message-Id: <20201129114148.13772-5-cezary.rojewski@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201129114148.13772-1-cezary.rojewski@intel.com> References: <20201129114148.13772-1-cezary.rojewski@intel.com> Cc: pierre-louis.bossart@linux.intel.com, Cezary Rojewski , alsa-devel@alsa-project.org, tiwai@suse.com, broonie@kernel.org, mateusz.gorski@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" commit 9e6c382f5a6161eb55115fb56614b9827f2e7da3 upstream. Some configurations expose no NHLT table at all within their /sys/firmware/acpi/tables. To prevent NULL-dereference errors from occurring, adjust probe flow and append additional safety checks in functions involved in NHLT lifecycle. Signed-off-by: Cezary Rojewski Reviewed-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20200305145314.32579-5-cezary.rojewski@intel.com Signed-off-by: Mark Brown Cc: # 5.4.x --- sound/soc/intel/skylake/skl-nhlt.c | 3 ++- sound/soc/intel/skylake/skl.c | 9 +++++++-- 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/sound/soc/intel/skylake/skl-nhlt.c b/sound/soc/intel/skylake/skl-nhlt.c index 19f328d71f24..d9c8f5cb389e 100644 --- a/sound/soc/intel/skylake/skl-nhlt.c +++ b/sound/soc/intel/skylake/skl-nhlt.c @@ -182,7 +182,8 @@ void skl_nhlt_remove_sysfs(struct skl_dev *skl) { struct device *dev = &skl->pci->dev; - sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr); + if (skl->nhlt) + sysfs_remove_file(&dev->kobj, &dev_attr_platform_id.attr); } /* diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c index 1a3a3d6a3141..2e5fbd220923 100644 --- a/sound/soc/intel/skylake/skl.c +++ b/sound/soc/intel/skylake/skl.c @@ -632,6 +632,9 @@ static int skl_clock_device_register(struct skl_dev *skl) struct platform_device_info pdevinfo = {NULL}; struct skl_clk_pdata *clk_pdata; + if (!skl->nhlt) + return 0; + clk_pdata = devm_kzalloc(&skl->pci->dev, sizeof(*clk_pdata), GFP_KERNEL); if (!clk_pdata) @@ -1090,7 +1093,8 @@ static int skl_probe(struct pci_dev *pci, out_clk_free: skl_clock_device_unregister(skl); out_nhlt_free: - intel_nhlt_free(skl->nhlt); + if (skl->nhlt) + intel_nhlt_free(skl->nhlt); out_free: skl_free(bus); @@ -1139,7 +1143,8 @@ static void skl_remove(struct pci_dev *pci) skl_dmic_device_unregister(skl); skl_clock_device_unregister(skl); skl_nhlt_remove_sysfs(skl); - intel_nhlt_free(skl->nhlt); + if (skl->nhlt) + intel_nhlt_free(skl->nhlt); skl_free(bus); dev_set_drvdata(&pci->dev, NULL); }