V4L/DVB (12483): Use DIV_ROUND_CLOSEST

The kernel.h macro DIV_ROUND_CLOSEST performs the computation (x + d/2)/d
but is perhaps more readable.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@haskernel@
@@

@depends on haskernel@
expression x,__divisor;
@@

- (((x) + ((__divisor) / 2)) / (__divisor))
+ DIV_ROUND_CLOSEST(x,__divisor)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 6 insertions, 4 deletions

diff --git a/drivers/media/dvb/frontends/dib7000p.c b/drivers/media/dvb/frontends/dib7000p.c
index 8217e5b38f47..fc96fbf03d6d 100644
--- a/drivers/media/dvb/frontends/dib7000p.c
+++ b/drivers/media/dvb/frontends/dib7000p.c
@@ -883,7 +883,7 @@ static void dib7000p_spur_protect(struct dib7000p_state *state, u32 rf_khz, u32
         255, 255, 255, 255, 255, 255};
 
         u32 xtal = state->cfg.bw->xtal_hz / 1000;
-        int f_rel = ( (rf_khz + xtal/2) / xtal) * xtal - rf_khz;
+        int f_rel = DIV_ROUND_CLOSEST(rf_khz, xtal) * xtal - rf_khz;
         int k;
         int coef_re[8],coef_im[8];
         int bw_khz = bw;
diff --git a/drivers/media/dvb/frontends/stb6100.c b/drivers/media/dvb/frontends/stb6100.c
index 1ed5a7db4c5e..60ee18a94f43 100644
--- a/drivers/media/dvb/frontends/stb6100.c
+++ b/drivers/media/dvb/frontends/stb6100.c
@@ -367,7 +367,9 @@ static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
         /* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1)))    */
         nint = fvco / (state->reference << psd2);
         /* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9       */
-        nfrac = (((fvco - (nint * state->reference << psd2)) << (9 - psd2)) + state->reference / 2) / state->reference;
+        nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2))
+                                         << (9 - psd2),
+                                  state->reference);
         dprintk(verbose, FE_DEBUG, 1,
                 "frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
                 frequency, srate, (unsigned int)g, (unsigned int)odiv,
diff --git a/drivers/media/dvb/frontends/tda10021.c b/drivers/media/dvb/frontends/tda10021.c
index f5d7b3277a2f..6c1dbf9288d8 100644
--- a/drivers/media/dvb/frontends/tda10021.c
+++ b/drivers/media/dvb/frontends/tda10021.c
@@ -176,7 +176,7 @@ static int tda10021_set_symbolrate (struct tda10021_state* state, u32 symbolrate
         tmp =  ((symbolrate << 4) % FIN) << 8;
         ratio = (ratio << 8) + tmp / FIN;
         tmp = (tmp % FIN) << 8;
-        ratio = (ratio << 8) + (tmp + FIN/2) / FIN;
+        ratio = (ratio << 8) + DIV_ROUND_CLOSEST(tmp, FIN);
 
         BDR = ratio;
         BDRI = (((XIN << 5) / symbolrate) + 1) / 2;
diff --git a/drivers/media/dvb/frontends/ves1820.c b/drivers/media/dvb/frontends/ves1820.c
index 6e78e4865515..550a07a8a997 100644
--- a/drivers/media/dvb/frontends/ves1820.c
+++ b/drivers/media/dvb/frontends/ves1820.c
@@ -165,7 +165,7 @@ static int ves1820_set_symbolrate(struct ves1820_state *state, u32 symbolrate)
         tmp = ((symbolrate << 4) % fin) << 8;
         ratio = (ratio << 8) + tmp / fin;
         tmp = (tmp % fin) << 8;
-        ratio = (ratio << 8) + (tmp + fin / 2) / fin;
+        ratio = (ratio << 8) + DIV_ROUND_CLOSEST(tmp, fin);
 
         BDR = ratio;
         BDRI = (((state->config->xin << 5) / symbolrate) + 1) / 2;