From eae37345c8653a3c797c1763c95289d924ee37a2 Mon Sep 17 00:00:00 2001 From: Arvind Yadav Date: Tue, 25 Jul 2017 15:44:34 +0530 Subject: [PATCH] ASoC: jz4740: Handle return value of clk_prepare_enable. clk_prepare_enable() can fail here and we must check its return value. Signed-off-by: Arvind Yadav Signed-off-by: Mark Brown --- sound/soc/jz4740/jz4740-i2s.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/sound/soc/jz4740/jz4740-i2s.c b/sound/soc/jz4740/jz4740-i2s.c index 794a3499e567..99394c036998 100644 --- a/sound/soc/jz4740/jz4740-i2s.c +++ b/sound/soc/jz4740/jz4740-i2s.c @@ -133,6 +133,7 @@ static int jz4740_i2s_startup(struct snd_pcm_substream *substream, { struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); uint32_t conf, ctrl; + int ret; if (dai->active) return 0; @@ -141,7 +142,9 @@ static int jz4740_i2s_startup(struct snd_pcm_substream *substream, ctrl |= JZ_AIC_CTRL_FLUSH; jz4740_i2s_write(i2s, JZ_REG_AIC_CTRL, ctrl); - clk_prepare_enable(i2s->clk_i2s); + ret = clk_prepare_enable(i2s->clk_i2s); + if (ret) + return ret; conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF); conf |= JZ_AIC_CONF_ENABLE; @@ -352,11 +355,18 @@ static int jz4740_i2s_resume(struct snd_soc_dai *dai) { struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); uint32_t conf; + int ret; - clk_prepare_enable(i2s->clk_aic); + ret = clk_prepare_enable(i2s->clk_aic); + if (ret) + return ret; if (dai->active) { - clk_prepare_enable(i2s->clk_i2s); + ret = clk_prepare_enable(i2s->clk_i2s); + if (ret) { + clk_disable_unprepare(i2s->clk_aic); + return ret; + } conf = jz4740_i2s_read(i2s, JZ_REG_AIC_CONF); conf |= JZ_AIC_CONF_ENABLE; @@ -387,8 +397,11 @@ static int jz4740_i2s_dai_probe(struct snd_soc_dai *dai) { struct jz4740_i2s *i2s = snd_soc_dai_get_drvdata(dai); uint32_t conf; + int ret; - clk_prepare_enable(i2s->clk_aic); + ret = clk_prepare_enable(i2s->clk_aic); + if (ret) + return ret; jz4740_i2c_init_pcm_config(i2s); snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data, -- 2.20.1