From patchwork Fri Oct 30 15:04:20 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinod Koul X-Patchwork-Id: 7527681 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E79A89F327 for ; Fri, 30 Oct 2015 15:04:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1F34D20634 for ; Fri, 30 Oct 2015 15:04:32 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id E2435205BD for ; Fri, 30 Oct 2015 15:04:29 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 04FD62664A5; Fri, 30 Oct 2015 16:04:29 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,NO_DNS_FOR_FROM, RCVD_IN_DNSWL_LOW, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id E5AA1261737; Fri, 30 Oct 2015 16:02:37 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id E14F826648B; Fri, 30 Oct 2015 16:02:33 +0100 (CET) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by alsa0.perex.cz (Postfix) with ESMTP id 5A446261643 for ; Fri, 30 Oct 2015 16:01:38 +0100 (CET) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga102.jf.intel.com with ESMTP; 30 Oct 2015 08:01:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,219,1444719600"; d="scan'208";a="807543294" Received: from vkoul-udesk7.iind.intel.com ([10.223.84.34]) by orsmga001.jf.intel.com with ESMTP; 30 Oct 2015 08:01:15 -0700 From: Vinod Koul To: alsa-devel@alsa-project.org Date: Fri, 30 Oct 2015 20:34:20 +0530 Message-Id: <1446217461-2106-4-git-send-email-vinod.koul@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1446217461-2106-1-git-send-email-vinod.koul@intel.com> References: <1446217461-2106-1-git-send-email-vinod.koul@intel.com> Cc: liam.r.girdwood@linux.intel.com, patches.audio@intel.com, broonie@kernel.org, Vinod Koul , Jeeja KP Subject: [alsa-devel] [PATCH 3/3] ASoC: Intel: Skylake: Fix substream dereference before check X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP Smatch warns that we dereferenced substream before check, so fix this by initializing ebus after the check sound/soc/intel/skylake/skl-pcm.c:802 skl_get_position() warn: variable dereferenced before check 'substream->runtime' Reported by: Dan Carpenter Signed-off-by: Jeeja KP Signed-off-by: Vinod Koul --- sound/soc/intel/skylake/skl-pcm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-pcm.c index 2517ec576ffc..e652d58bd9a9 100644 --- a/sound/soc/intel/skylake/skl-pcm.c +++ b/sound/soc/intel/skylake/skl-pcm.c @@ -807,7 +807,7 @@ static unsigned int skl_get_position(struct hdac_ext_stream *hstream, { struct hdac_stream *hstr = hdac_stream(hstream); struct snd_pcm_substream *substream = hstr->substream; - struct hdac_ext_bus *ebus = get_bus_ctx(substream); + struct hdac_ext_bus *ebus; unsigned int pos; int delay; @@ -818,6 +818,7 @@ static unsigned int skl_get_position(struct hdac_ext_stream *hstream, pos = 0; if (substream->runtime) { + ebus = get_bus_ctx(substream); delay = skl_get_delay_from_lpib(ebus, hstream, pos) + codec_delay; substream->runtime->delay += delay;