[alsa-devel] [PATCH] ASoC: rsnd: Fixup SRCm_IFSVR calculate method

[Kuninori Morimoto]

From: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx at renesas.com>

This patch fixes the calculation accuracy degradation of SRCm_IFSVR
register value.

Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx at renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
 sound/soc/sh/rcar/src.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c
index e39f916..969a516 100644
--- a/sound/soc/sh/rcar/src.c
+++ b/sound/soc/sh/rcar/src.c
@@ -226,8 +226,12 @@ static void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io,
 	ifscr = 0;
 	fsrate = 0;
 	if (fin != fout) {
+		u64 n;
+
 		ifscr = 1;
-		fsrate = 0x0400000 / fout * fin;
+		n = (u64)0x0400000 * fin;
+		do_div(n, fout);
+		fsrate = n;
 	}
 
 	/*
-- 
1.9.1