ASoC: tlv320aic31xx: Check clock and divider before division

If our set_sysclk DAI callback has not been called yet p_div will be 0
and dividing by this will cause an error. Print an error message and
leave before this.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/sound/soc/codecs/tlv320aic31xx.c b/sound/soc/codecs/tlv320aic31xx.c
index ab03a19f6aaa..05e6d194d6a9 100644
--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -754,11 +754,17 @@ static int aic31xx_setup_pll(struct snd_soc_codec *codec,
 {
         struct aic31xx_priv *aic31xx = snd_soc_codec_get_drvdata(codec);
         int bclk_score = snd_soc_params_to_frame_size(params);
-        int mclk_p = aic31xx->sysclk / aic31xx->p_div;
+        int mclk_p;
         int bclk_n = 0;
         int match = -1;
         int i;
 
+        if (!aic31xx->sysclk || !aic31xx->p_div) {
+                dev_err(codec->dev, "Master clock not supplied\n");
+                return -EINVAL;
+        }
+        mclk_p = aic31xx->sysclk / aic31xx->p_div;
+
         /* Use PLL as CODEC_CLKIN and DAC_CLK as BDIV_CLKIN */
         snd_soc_update_bits(codec, AIC31XX_CLKMUX,
                             AIC31XX_CODEC_CLKIN_MASK, AIC31XX_CODEC_CLKIN_PLL);