[media] m88ds3103: fix SNR reporting on 32-bit arch
There was 32-bit calculation overflow. Use div_u64.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/media/dvb-frontends/m88ds3103.c b/drivers/media/dvb-frontends/m88ds3103.c
index 2ef8ce1..4176edf 100644
--- a/drivers/media/dvb-frontends/m88ds3103.c
+++ b/drivers/media/dvb-frontends/m88ds3103.c
@@ -879,7 +879,7 @@
/* SNR(X) dB = 10 * ln(X) / ln(10) dB */
tmp = DIV_ROUND_CLOSEST(tmp, 8 * M88DS3103_SNR_ITERATIONS);
if (tmp)
- *snr = 100ul * intlog2(tmp) / intlog2(10);
+ *snr = div_u64((u64) 100 * intlog2(tmp), intlog2(10));
else
*snr = 0;
break;
@@ -908,7 +908,7 @@
/* SNR(X) dB = 10 * log10(X) dB */
if (signal > noise) {
tmp = signal / noise;
- *snr = 100ul * intlog10(tmp) / (1 << 24);
+ *snr = div_u64((u64) 100 * intlog10(tmp), (1 << 24));
} else {
*snr = 0;
}