V4L/DVB (13111): tda18271: more signedness fixes

Convert tda18271_rf_tracking_filter_cal.rf_[ab][12] from int to s32.
Convert tda18271_priv.tm_rfcal from unsigned int to u8.
Cast subtractions between u32 values as s32.

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

2 files changed, 17 insertions, 15 deletions

diff --git a/drivers/media/common/tuners/tda18271-fe.c b/drivers/media/common/tuners/tda18271-fe.c
index 8b515a7d93f8..e0fd9f5d5944 100644
--- a/drivers/media/common/tuners/tda18271-fe.c
+++ b/drivers/media/common/tuners/tda18271-fe.c
@@ -256,8 +256,9 @@ static int tda18271c2_rf_tracking_filters_correction(struct dvb_frontend *fe,
         struct tda18271_priv *priv = fe->tuner_priv;
         struct tda18271_rf_tracking_filter_cal *map = priv->rf_cal_state;
         unsigned char *regs = priv->tda18271_regs;
-        int tm_current, rfcal_comp, approx, i, ret;
-        u8 dc_over_dt, rf_tab;
+        int i, ret;
+        u8 tm_current, dc_over_dt, rf_tab;
+        s32 rfcal_comp, approx;
 
         /* power up */
         ret = tda18271_set_standby_mode(fe, 0, 0, 0);
@@ -277,11 +278,11 @@ static int tda18271c2_rf_tracking_filters_correction(struct dvb_frontend *fe,
                 return i;
 
         if ((0 == map[i].rf3) || (freq / 1000 < map[i].rf2)) {
-                approx = map[i].rf_a1 *
-                        (freq / 1000 - map[i].rf1) + map[i].rf_b1 + rf_tab;
+                approx = map[i].rf_a1 * (s32)(freq / 1000 - map[i].rf1) +
+                        map[i].rf_b1 + rf_tab;
         } else {
-                approx = map[i].rf_a2 *
-                        (freq / 1000 - map[i].rf2) + map[i].rf_b2 + rf_tab;
+                approx = map[i].rf_a2 * (s32)(freq / 1000 - map[i].rf2) +
+                        map[i].rf_b2 + rf_tab;
         }
 
         if (approx < 0)
@@ -292,9 +293,9 @@ static int tda18271c2_rf_tracking_filters_correction(struct dvb_frontend *fe,
         tda18271_lookup_map(fe, RF_CAL_DC_OVER_DT, &freq, &dc_over_dt);
 
         /* calculate temperature compensation */
-        rfcal_comp = dc_over_dt * (tm_current - priv->tm_rfcal) / 1000;
+        rfcal_comp = dc_over_dt * (s32)(tm_current - priv->tm_rfcal) / 1000;
 
-        regs[R_EB14] = approx + rfcal_comp;
+        regs[R_EB14] = (unsigned char)(approx + rfcal_comp);
         ret = tda18271_write_regs(fe, R_EB14, 1);
 fail:
         return ret;
@@ -611,7 +612,7 @@ static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
                 switch (rf) {
                 case RF1:
                         map[i].rf_a1 = 0;
-                        map[i].rf_b1 = prog_cal[RF1] - prog_tab[RF1];
+                        map[i].rf_b1 = (s32)(prog_cal[RF1] - prog_tab[RF1]);
                         map[i].rf1   = rf_freq[RF1] / 1000;
                         break;
                 case RF2:
@@ -626,7 +627,7 @@ static int tda18271_rf_tracking_filters_init(struct dvb_frontend *fe, u32 freq)
                                    (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].rf_b2 = (s32)(prog_cal[RF2] - prog_tab[RF2]);
                         map[i].rf3   = rf_freq[RF3] / 1000;
                         break;
                 default:
diff --git a/drivers/media/common/tuners/tda18271-priv.h b/drivers/media/common/tuners/tda18271-priv.h
index 2bee229acd91..74075be4dea3 100644
--- a/drivers/media/common/tuners/tda18271-priv.h
+++ b/drivers/media/common/tuners/tda18271-priv.h
@@ -80,10 +80,10 @@ struct tda18271_rf_tracking_filter_cal {
         u32 rf1;
         u32 rf2;
         u32 rf3;
-        int rf_a1;
-        int rf_b1;
-        int rf_a2;
-        int rf_b2;
+        s32 rf_a1;
+        s32 rf_b1;
+        s32 rf_a2;
+        s32 rf_b2;
 };
 
 enum tda18271_pll {
@@ -111,10 +111,11 @@ struct tda18271_priv {
         enum tda18271_output_options output_opt;
 
         unsigned int config; /* interface to saa713x / tda829x */
-        unsigned int tm_rfcal;
         unsigned int cal_initialized:1;
         unsigned int small_i2c:1;
 
+        u8 tm_rfcal;
+
         struct tda18271_map_layout *maps;
         struct tda18271_std_map std;
         struct tda18271_rf_tracking_filter_cal rf_cal_state[8];