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Subject[PATCH 07/11] ASoC: jz4740: Handle return value of clk_prepare_enable.
Date
clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
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 794a349..99394c0 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,
--
1.9.1
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