V4L/DVB: cx22702: Avoid duplicating code in branches

Calling the same functions in if/else or switch/case branches is
inefficient. Refactor the code for a smaller binary and increased
readability.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/frontends/cx22702.c b/drivers/media/dvb/frontends/cx22702.c
index c3681d1..a5dcf87 100644 (file)
--- a/drivers/media/dvb/frontends/cx22702.c
+++ b/drivers/media/dvb/frontends/cx22702.c
@@ -128,19 +128,20 @@ static int cx22702_set_inversion(struct cx22702_state *state, int inversion)
 {
        u8 val;
 
+       val = cx22702_readreg(state, 0x0C);
        switch (inversion) {
        case INVERSION_AUTO:
                return -EOPNOTSUPP;
        case INVERSION_ON:
-               val = cx22702_readreg(state, 0x0C);
-               return cx22702_writereg(state, 0x0C, val | 0x01);
+               val |= 0x01;
+               break;
        case INVERSION_OFF:
-               val = cx22702_readreg(state, 0x0C);
-               return cx22702_writereg(state, 0x0C, val & 0xfe);
+               val &= 0xfe;
+               break;
        default:
                return -EINVAL;
        }
-
+       return cx22702_writereg(state, 0x0C, val);
 }
 
 /* Retrieve the demod settings */
@@ -247,13 +248,15 @@ static int cx22702_get_tps(struct cx22702_state *state,
 static int cx22702_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 {
        struct cx22702_state *state = fe->demodulator_priv;
+       u8 val;
+
        dprintk("%s(%d)\n", __func__, enable);
+       val = cx22702_readreg(state, 0x0D);
        if (enable)
-               return cx22702_writereg(state, 0x0D,
-                       cx22702_readreg(state, 0x0D) & 0xfe);
+               val &= 0xfe;
        else
-               return cx22702_writereg(state, 0x0D,
-                       cx22702_readreg(state, 0x0D) | 1);
+               val |= 0x01;
+       return cx22702_writereg(state, 0x0D, val);
 }
 
 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */
@@ -273,23 +276,21 @@ static int cx22702_set_tps(struct dvb_frontend *fe,
        cx22702_set_inversion(state, p->inversion);
 
        /* set bandwidth */
+       val = cx22702_readreg(state, 0x0C) & 0xcf;
        switch (p->u.ofdm.bandwidth) {
        case BANDWIDTH_6_MHZ:
-               cx22702_writereg(state, 0x0C,
-                       (cx22702_readreg(state, 0x0C) & 0xcf) | 0x20);
+               val |= 0x20;
                break;
        case BANDWIDTH_7_MHZ:
-               cx22702_writereg(state, 0x0C,
-                       (cx22702_readreg(state, 0x0C) & 0xcf) | 0x10);
+               val |= 0x10;
                break;
        case BANDWIDTH_8_MHZ:
-               cx22702_writereg(state, 0x0C,
-                       cx22702_readreg(state, 0x0C) & 0xcf);
                break;
        default:
                dprintk("%s: invalid bandwidth\n", __func__);
                return -EINVAL;
        }
+       cx22702_writereg(state, 0x0C, val);
 
        p->u.ofdm.code_rate_LP = FEC_AUTO; /* temp hack as manual not working */