[media] tda18271: prog_cal and prog_tab variables should be s32, not u8

Fix type of prog_cal and prog_tab variables to avoid any possible
calculation errors.

Signed-off-by: Michael Krufky <mkrufky@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/common/tuners/tda18271-fe.c b/drivers/media/common/tuners/tda18271-fe.c
index 42105d1..d884f5e 100644 (file)
--- a/drivers/media/common/tuners/tda18271-fe.c
+++ b/drivers/media/common/tuners/tda18271-fe.c
@@ -579,8 +579,8 @@ static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
 #define RF3 2
        u32 rf_default[3];
        u32 rf_freq[3];
-       u8 prog_cal[3];
-       u8 prog_tab[3];
+       s32 prog_cal[3];
+       s32 prog_tab[3];
 
        i = tda18271_lookup_rf_band(fe, &freq, NULL);
 
@@ -602,32 +602,33 @@ static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
                        return bcal;
 
                tda18271_calc_rf_cal(fe, &rf_freq[rf]);
-               prog_tab[rf] = regs[R_EB14];
+               prog_tab[rf] = (s32)regs[R_EB14];
 
                if (1 == bcal)
-                       prog_cal[rf] = tda18271_calibrate_rf(fe, rf_freq[rf]);
+                       prog_cal[rf] =
+                               (s32)tda18271_calibrate_rf(fe, rf_freq[rf]);
                else
                        prog_cal[rf] = prog_tab[rf];
 
                switch (rf) {
                case RF1:
                        map[i].rf_a1 = 0;
-                       map[i].rf_b1 = (s32)(prog_cal[RF1] - prog_tab[RF1]);
+                       map[i].rf_b1 = (prog_cal[RF1] - prog_tab[RF1]);
                        map[i].rf1   = rf_freq[RF1] / 1000;
                        break;
                case RF2:
-                       dividend = (s32)(prog_cal[RF2] - prog_tab[RF2] -
-                                        prog_cal[RF1] + prog_tab[RF1]);
+                       dividend = (prog_cal[RF2] - prog_tab[RF2] -
+                                   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:
-                       dividend = (s32)(prog_cal[RF3] - prog_tab[RF3] -
-                                        prog_cal[RF2] + prog_tab[RF2]);
+                       dividend = (prog_cal[RF3] - prog_tab[RF3] -
+                                   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 = (s32)(prog_cal[RF2] - prog_tab[RF2]);
+                       map[i].rf_b2 = (prog_cal[RF2] - prog_tab[RF2]);
                        map[i].rf3   = rf_freq[RF3] / 1000;
                        break;
                default: