From patchwork Mon Jun 15 16:00:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 192435 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=DKIM_SIGNED,DKIM_VALID, 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 06AEBC433DF for ; Mon, 15 Jun 2020 16:02:42 +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 7E82320679 for ; Mon, 15 Jun 2020 16:02:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="aV62COA4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7E82320679 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de 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 12D0D1655; Mon, 15 Jun 2020 18:01:50 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 12D0D1655 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1592236960; bh=LI5e9jfSKxkkOHBpDMhC8aRwfh20aL94/sP3PZXgPUY=; h=From:To:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=aV62COA44KuhKDjjPThHqZPStdgYXlyli2DUP9t7sCj2tnyTaNGxp0jNkZwLwndPo qT0mlUfZN5jys00RVjsUAQ0Pz8kOh0rPLyMFsYW4kGtwyBSzvR1Gwi+e0wiEfdEyrL f1BGAS2Wmaq75VhEpZwGRGHBMqki9LGQq6LENrdI= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 98A49F80171; Mon, 15 Jun 2020 18:00:58 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id A2C9DF801ED; Mon, 15 Jun 2020 18:00:54 +0200 (CEST) Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 5B7E1F800EF for ; Mon, 15 Jun 2020 18:00:47 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 5B7E1F800EF X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 39B66ADF2 for ; Mon, 15 Jun 2020 16:00:51 +0000 (UTC) From: Takashi Iwai To: alsa-devel@alsa-project.org Subject: [PATCH 2/4] ALSA: memalloc: Initialize all fields of snd_dma_buffer properly Date: Mon, 15 Jun 2020 18:00:43 +0200 Message-Id: <20200615160045.2703-3-tiwai@suse.de> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20200615160045.2703-1-tiwai@suse.de> References: <20200615160045.2703-1-tiwai@suse.de> 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" Some fields in snd_dma_buffer aren't touched in snd_dma_alloc_pages() and might be left uninitialized. Let's clear all fields properly, so that we can use a NULL check (e.g. dmab->private_data) as conditional in a later patch. Signed-off-by: Takashi Iwai --- sound/core/memalloc.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c index bea46ed157a6..d8f28d030985 100644 --- a/sound/core/memalloc.c +++ b/sound/core/memalloc.c @@ -135,16 +135,17 @@ int snd_dma_alloc_pages(int type, struct device *device, size_t size, dmab->dev.type = type; dmab->dev.dev = device; dmab->bytes = 0; + dmab->area = NULL; + dmab->addr = 0; + dmab->private_data = NULL; switch (type) { case SNDRV_DMA_TYPE_CONTINUOUS: gfp = snd_mem_get_gfp_flags(device, GFP_KERNEL); dmab->area = alloc_pages_exact(size, gfp); - dmab->addr = 0; break; case SNDRV_DMA_TYPE_VMALLOC: gfp = snd_mem_get_gfp_flags(device, GFP_KERNEL | __GFP_HIGHMEM); dmab->area = __vmalloc(size, gfp); - dmab->addr = 0; break; #ifdef CONFIG_HAS_DMA #ifdef CONFIG_GENERIC_ALLOCATOR @@ -171,8 +172,6 @@ int snd_dma_alloc_pages(int type, struct device *device, size_t size, #endif default: pr_err("snd-malloc: invalid device type %d\n", type); - dmab->area = NULL; - dmab->addr = 0; return -ENXIO; } if (! dmab->area)