ASoC: fsl_asrc: Fix the issue about unsupported rate

When the output sample rate is [8kHz, 30kHz], the limitation
of the supported ratio range is [1/24, 8]. In the driver
we use (8kHz, 30kHz) instead of [8kHz, 30kHz].
So this patch is to fix this issue and the potential rounding
issue with divider.

Fixes: fff6e03c7b65 ("ASoC: fsl_asrc: add support for 8-30kHz
output sample rate")
Cc: <stable@vger.kernel.org>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index 0b93792..ea035c1 100644 (file)
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -282,8 +282,8 @@ static int fsl_asrc_config_pair(struct fsl_asrc_pair *pair)
                return -EINVAL;
        }
 
-       if ((outrate > 8000 && outrate < 30000) &&
-           (outrate/inrate > 24 || inrate/outrate > 8)) {
+       if ((outrate >= 8000 && outrate <= 30000) &&
+           (outrate > 24 * inrate || inrate > 8 * outrate)) {
                pair_err("exceed supported ratio range [1/24, 8] for \
                                inrate/outrate: %d/%d\n", inrate, outrate);
                return -EINVAL;