From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oder Chiou Subject: [PATCH 1/2] ASoC: rt5514: Fix the issue that the variable dereferenced before checking Date: Fri, 17 Jun 2016 11:02:23 +0800 Message-ID: <1466132544-22916-1-git-send-email-oder_chiou@realtek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from rtits2.realtek.com.tw (rtits2.realtek.com [60.250.210.242]) by alsa0.perex.cz (Postfix) with ESMTP id 9E26C2657B1 for ; Fri, 17 Jun 2016 05:02:34 +0200 (CEST) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: broonie@kernel.org, lgirdwood@gmail.com Cc: Oder Chiou , jack.yu@realtek.com, alsa-devel@alsa-project.org, shumingf@realtek.com, bardliao@realtek.com, flove@realtek.com List-Id: alsa-devel@alsa-project.org The patch fixes the issue that variable dereferenced before checking 'rt5514_dsp->substream'. Move the assignment to after the variable checking of 'rt5514_dsp->substream'. Signed-off-by: Oder Chiou --- sound/soc/codecs/rt5514-spi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c index 8a9382e..743f509 100644 --- a/sound/soc/codecs/rt5514-spi.c +++ b/sound/soc/codecs/rt5514-spi.c @@ -80,7 +80,7 @@ static void rt5514_spi_copy_work(struct work_struct *work) { struct rt5514_dsp *rt5514_dsp = container_of(work, struct rt5514_dsp, copy_work.work); - struct snd_pcm_runtime *runtime = rt5514_dsp->substream->runtime; + struct snd_pcm_runtime *runtime; size_t period_bytes, truncated_bytes = 0; mutex_lock(&rt5514_dsp->dma_lock); @@ -89,6 +89,7 @@ static void rt5514_spi_copy_work(struct work_struct *work) goto done; } + runtime = rt5514_dsp->substream->runtime; period_bytes = snd_pcm_lib_period_bytes(rt5514_dsp->substream); if (rt5514_dsp->buf_size - rt5514_dsp->dsp_offset < period_bytes) -- 1.8.1.1.439.g50a6b54