From: Gustavo A. R. Silva Date: Wed, 4 Jul 2018 14:28:28 +0000 (-0500) Subject: ASoC: nau8825: use 64-bit arithmetic instead of 32-bit X-Git-Tag: v4.19~92^2~2^2~196 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=da13ed1d80fe6a4d95043aaf2e0aff292ade5708;p=platform%2Fkernel%2Flinux-rpi3.git ASoC: nau8825: use 64-bit arithmetic instead of 32-bit Add suffix ULL to constant 256 in order to give the compiler complete information about the proper arithmetic to use. Notice that such constant is used in a context that expects an expression of type u64 (64 bits, unsigned) and the following expression is currently being evaluated using 32-bit arithmetic: 256 * fs * 2 * mclk_src_scaling[i].param Addresses-Coverity-ID: 1339616 ("Unintentional integer overflow") Signed-off-by: Gustavo A. R. Silva Signed-off-by: Mark Brown --- diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c index dc6ea49..b9fed99 100644 --- a/sound/soc/codecs/nau8825.c +++ b/sound/soc/codecs/nau8825.c @@ -2016,7 +2016,7 @@ static int nau8825_calc_fll_param(unsigned int fll_in, unsigned int fs, fvco_max = 0; fvco_sel = ARRAY_SIZE(mclk_src_scaling); for (i = 0; i < ARRAY_SIZE(mclk_src_scaling); i++) { - fvco = 256 * fs * 2 * mclk_src_scaling[i].param; + fvco = 256ULL * fs * 2 * mclk_src_scaling[i].param; if (fvco > NAU_FVCO_MIN && fvco < NAU_FVCO_MAX && fvco_max < fvco) { fvco_max = fvco;