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V4L/DVB (13110): tda18271: use temporary variables in tda18271_rf_tracking_filters_init

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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>
This commit is contained in:
Michael Krufky 2009-09-27 17:00:13 -03:00 committed by Mauro Carvalho Chehab
parent b450b92e16
commit 3986bd116f
1 changed files with 9 additions and 6 deletions
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15
drivers/media/common/tuners/tda18271-fe.c
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@ -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;