ASoC: fsl_esai: Fix incorrect condition within ratio range check for FP

The range here from 1 to 16 is confined to FP divider only while the
sck_div indicates if the calculation contains PSR and PM dividers. So
for the case using PSR and PM since the sck_div is true, the range of
ratio would simply become bigger than 16.

So this patch fixes the condition here and adds one line comments to
make the purpose here clear.

Signed-off-by: Nicolin Chen <Guangyu.Chen@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
index c8e5db1414d7e75f4077728765a210877f4b3cd9..35c0b9295a80080d8f476ea40a46d94781248edb 100644 (file)
--- a/sound/soc/fsl/fsl_esai.c
+++ b/sound/soc/fsl/fsl_esai.c
@@ -307,7 +307,8 @@ static int fsl_esai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq)
                return -EINVAL;
        }
 
-       if (esai_priv->sck_div[tx] && (ratio > 16 || ratio == 0)) {
+       /* The ratio should be contented by FP alone if bypassing PM and PSR */
+       if (!esai_priv->sck_div[tx] && (ratio > 16 || ratio == 0)) {
                dev_err(dai->dev, "the ratio is out of range (1 ~ 16)\n");
                return -EINVAL;
        }