[alsa-devel] [PATCH] ASoC: fsl_asrc: add protection for the asrc of older version

[S.j. Wang]

There is a constraint for the channel number setting on the
asrc of older version (e.g. imx35), the channel number should
be even, odd number isn't valid.

So add protection when the asrc of older version is used.

Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>
---
 sound/soc/fsl/fsl_asrc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index 528e8b108422..b3b3c5e15ef1 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -109,7 +109,8 @@ 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 {
-- 
1.9.1