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authorNicolin Chen <nicoleotsuka@gmail.com>2018-04-08 17:33:54 -0700
committerMark Brown <broonie@kernel.org>2018-04-16 13:04:40 +0100
commit8a2278b7fb3df67cd415c679ba1a0e5e4a1761a7 (patch)
treed53889272ca23930fc49af307484cb228df55e13 /sound/soc/fsl
parent728815e3feec751769b3a9fe406fbc529de7cdc0 (diff)
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>
Diffstat (limited to 'sound/soc/fsl')
-rw-r--r--sound/soc/fsl/fsl_esai.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
index da8fd98c7f51..d79e99ef31ad 100644
--- a/sound/soc/fsl/fsl_esai.c
+++ b/sound/soc/fsl/fsl_esai.c
@@ -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;