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Commit f073faa7 authored by Howard Mitchell's avatar Howard Mitchell Committed by Mark Brown
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ASoC: pcm512x: Fix divide by zero issue 



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: default avatarHoward Mitchell <hm@hmbedded.co.uk>
Signed-off-by: default avatarMark Brown <broonie@sirena.org.uk>
Cc: stable@vger.kernel.org
parent 4d9b13c7

sound/soc/codecs/pcm512x.c

+2 −2
Original line number Diff line number Diff line
@@ -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);