diff options
| author | Howard Mitchell <hm@hmbedded.co.uk> | 2015-03-20 21:13:45 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-06 22:03:56 +0200 |
| commit | 43ebd1a85ee86416c2d45a3834e7425c396890e9 (patch) | |
| tree | 0598516fdb4bfd7200a7c03aedaeb08e20f0564f /sound | |
| parent | f646e040a619bcea31a6cab378ccaccb6f4cb659 (diff) | |
ASoC: pcm512x: Fix divide by zero issue
commit f073faa73626f41db7050a69edd5074c53ce6d6c upstream.
If den=1 and pllin_rate>20MHz then den and num are adjusted to 0
causing a divide by zero error a few lines further on. Therefore
this patch correctly scales num and den such that
pllin_rate/den < 20MHz as required in the device data sheet.
Signed-off-by: Howard Mitchell <hm@hmbedded.co.uk>
Signed-off-by: Mark Brown <broonie@sirena.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/pcm512x.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c index b48624cf995f..8c09e3ffdcaa 100644 --- a/sound/soc/codecs/pcm512x.c +++ b/sound/soc/codecs/pcm512x.c @@ -576,8 +576,8 @@ static int pcm512x_find_pll_coeff(struct snd_soc_dai *dai, /* pllin_rate / P (or here, den) cannot be greater than 20 MHz */ if (pllin_rate / den > 20000000 && num < 8) { - num *= 20000000 / (pllin_rate / den); - den *= 20000000 / (pllin_rate / den); + num *= DIV_ROUND_UP(pllin_rate / den, 20000000); + den *= DIV_ROUND_UP(pllin_rate / den, 20000000); } dev_dbg(dev, "num / den = %lu / %lu\n", num, den); |