Applied "ASoC: fsl_spdif: Use 64-bit arithmetic instead of 32-bit" to the asoc tree

Mark Brown broonie at
Thu Jul 5 20:08:39 AEST 2018

The patch

   ASoC: fsl_spdif: Use 64-bit arithmetic instead of 32-bit

has been applied to the asoc tree at 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

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>From b999a7a9e72bd2d37b5d03772cedfc4dd45875bf Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavo at>
Date: Wed, 4 Jul 2018 09:18:33 -0500
Subject: [PATCH] ASoC: fsl_spdif: Use 64-bit arithmetic instead of 32-bit

Add suffix ULL to constant 64 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:

rate[index] * txclk_df * 64

Addresses-Coverity-ID: 1222129 ("Unintentional integer overflow")
Signed-off-by: Gustavo A. R. Silva <gustavo at>
Acked-by: Nicolin Chen <nicoleotsuka at>
Signed-off-by: Mark Brown <broonie at>
 sound/soc/fsl/fsl_spdif.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 9b59d87b61bf..740b90df44bb 100644
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -1118,7 +1118,7 @@ static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv,
 	for (sysclk_df = sysclk_dfmin; sysclk_df <= sysclk_dfmax; sysclk_df++) {
 		for (txclk_df = 1; txclk_df <= 128; txclk_df++) {
-			rate_ideal = rate[index] * txclk_df * 64;
+			rate_ideal = rate[index] * txclk_df * 64ULL;
 			if (round)
 				rate_actual = clk_round_rate(clk, rate_ideal);

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