[PATCH v2 26/26] media: dvb-frontends: tda10048: Make explicit the range of z.

[Ricardo Ribalda]

We do not expect the sample_freq to be over 613MHz.

Found by cocci:
drivers/media/dvb-frontends/tda10048.c:345:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead.

Signed-off-by: Ricardo Ribalda <ribalda at chromium.org>
---
 drivers/media/dvb-frontends/tda10048.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/dvb-frontends/tda10048.c b/drivers/media/dvb-frontends/tda10048.c
index 3e725cdcc66b..1886f733dbbf 100644
--- a/drivers/media/dvb-frontends/tda10048.c
+++ b/drivers/media/dvb-frontends/tda10048.c
@@ -328,7 +328,8 @@ static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz,
 			     u32 bw)
 {
 	struct tda10048_state *state = fe->demodulator_priv;
-	u64 t, z;
+	u32 z;
+	u64 t;
 
 	dprintk(1, "%s()\n", __func__);
 
@@ -341,6 +342,7 @@ static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz,
 	/* t *= 2147483648 on 32bit platforms */
 	t *= (2048 * 1024);
 	t *= 1024;
+	/* Sample frequency is under 613MHz */
 	z = 7 * sample_freq_hz;
 	do_div(t, z);
 	t += 5;

-- 
2.44.0.769.g3c40516874-goog