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ASoC: fsl_esai: Add freq check in set_dai_sysclk() 

The freq parameter indicates the physical frequency of an actual
input clock or a desired frequency of an output clock for HCKT/R.
It should never be passed 0. This might cause Division-by-zero.

So this patch adds a check to fix it.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Nicolin Chen 2018-04-08 17:33:54 -07:00 committed by Mark Brown
parent 728815e3fe
commit 8a2278b7fb
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1 changed files with 6 additions and 0 deletions
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6
sound/soc/fsl/fsl_esai.c
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@ -226,6 +226,12 @@ static int fsl_esai_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned long clk_rate;
int ret;
if (freq == 0) {
dev_err(dai->dev, "%sput freq of HCK%c should not be 0Hz\n",
in ? "in" : "out", tx ? 'T' : 'R');
return -EINVAL;
}
/* Bypass divider settings if the requirement doesn't change */
if (freq == esai_priv->hck_rate[tx] && dir == esai_priv->hck_dir[tx])
return 0;