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authorMichael Krufky <mkrufky@kernellabs.com>2009-09-27 17:00:13 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-12-05 18:40:23 -0200
commit3986bd116f3c53d695aef1781e14b6c5670d4cdd (patch)
tree805fd3f8cac0c4f60e1ec24c6e9f74783d0b2367 /drivers/media/common
parentb450b92e162a454b82fea6373c83e447e28ce4d6 (diff)
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V4L/DVB (13110): tda18271: use temporary variables in tda18271_rf_tracking_filters_init
Use temporary variables for signed calulations between unsigned values Signed-off-by: Michael Krufky <mkrufky@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/common')
-rw-r--r--drivers/media/common/tuners/tda18271-fe.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/media/common/tuners/tda18271-fe.c b/drivers/media/common/tuners/tda18271-fe.c
index 3a50ce9..8b515a7 100644
--- a/drivers/media/common/tuners/tda18271-fe.c
+++ b/drivers/media/common/tuners/tda18271-fe.c
@@ -572,6 +572,7 @@ static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
struct tda18271_rf_tracking_filter_cal *map = priv->rf_cal_state;
unsigned char *regs = priv->tda18271_regs;
int bcal, rf, i;
+ s32 divisor, dividend;
#define RF1 0
#define RF2 1
#define RF3 2
@@ -614,15 +615,17 @@ static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
map[i].rf1 = rf_freq[RF1] / 1000;
break;
case RF2:
- map[i].rf_a1 = (prog_cal[RF2] - prog_tab[RF2] -
- prog_cal[RF1] + prog_tab[RF1]) /
- (s32)((rf_freq[RF2] - rf_freq[RF1]) / 1000);
+ dividend = (s32)(prog_cal[RF2] - prog_tab[RF2]) -
+ (s32)(prog_cal[RF1] + prog_tab[RF1]);
+ divisor = (s32)(rf_freq[RF2] - rf_freq[RF1]) / 1000;
+ map[i].rf_a1 = (dividend / divisor);
map[i].rf2 = rf_freq[RF2] / 1000;
break;
case RF3:
- map[i].rf_a2 = (prog_cal[RF3] - prog_tab[RF3] -
- prog_cal[RF2] + prog_tab[RF2]) /
- (s32)((rf_freq[RF3] - rf_freq[RF2]) / 1000);
+ dividend = (s32)(prog_cal[RF3] - prog_tab[RF3]) -
+ (s32)(prog_cal[RF2] + prog_tab[RF2]);
+ divisor = (s32)(rf_freq[RF3] - rf_freq[RF2]) / 1000;
+ map[i].rf_a2 = (dividend / divisor);
map[i].rf_b2 = prog_cal[RF2] - prog_tab[RF2];
map[i].rf3 = rf_freq[RF3] / 1000;
break;