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ASoC: jz4740-i2s: add missed checks for clk_get() 

jz4740_i2s_set_sysclk() does not check the return values of clk_get(),
while the file dereferences the pointers in clk_put().
Add the missed checks to fix it.

Fixes: 11bd3dd1b7 ("ASoC: Add JZ4740 ASoC support")
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Link: https://lore.kernel.org/r/20201203144227.418194-1-hslester96@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Chuhong Yuan 2020-12-03 22:42:27 +08:00 committed by Mark Brown
parent 0d7f2459ae
commit 1c1fb2653a
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 0 deletions
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4
sound/soc/jz4740/jz4740-i2s.c
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@ -312,10 +312,14 @@ static int jz4740_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
switch (clk_id) {
case JZ4740_I2S_CLKSRC_EXT:
parent = clk_get(NULL, "ext");
if (IS_ERR(parent))
return PTR_ERR(parent);
clk_set_parent(i2s->clk_i2s, parent);
break;
case JZ4740_I2S_CLKSRC_PLL:
parent = clk_get(NULL, "pll half");
if (IS_ERR(parent))
return PTR_ERR(parent);
clk_set_parent(i2s->clk_i2s, parent);
ret = clk_set_rate(i2s->clk_i2s, freq);
break;