[media] dvb-core: fix 32-bit overflow during bandwidth calculation
Frontend bandwidth calculation overflows on very high DVB-S/S2
symbol rates. Use mult_frac() macro in order to keep calculation
correct.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index 882ca41..a894d4c 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -2216,7 +2216,7 @@
break;
}
if (rolloff)
- c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
+ c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
/* force auto frequency inversion if requested */
if (dvb_force_auto_inversion)