MLK-10048-1: ASoC: fsl_asrc: add protection the old version asrc

The latest asrc's channel bits is 4, bit the old asrc's channel bits is 3. So here add protection for when using the old version asrc. Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>

MLK-10048-1: ASoC: fsl_asrc: add protection the old version asrc
a0ff6eee · Shengjiu Wang · Nitin Garg · f3c7b834 · a0ff6eee
Commit a0ff6eee authored Dec 08, 2014 by Shengjiu Wang Committed by Nitin Garg Jan 15, 2015
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fsl_asrc.c sound/soc/fsl/fsl_asrc.c +2 -1

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--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -113,7 +113,8 @@ static int fsl_asrc_request_pair(int channels, struct fsl_asrc_pair *pair)
 	if (index == ASRC_INVALID_PAIR) {
 		dev_err(dev, "all pairs are busy now\n");
 		ret = -EBUSY;
-	} else if (asrc_priv->channel_avail < channels) {
+	} else if (asrc_priv->channel_avail < channels ||
+		(asrc_priv->channel_bits < 4 && channels % 2 != 0)) {
 		dev_err(dev, "can't afford required channels: %d\n", channels);
 		ret = -EINVAL;
 	} else {