V4L/DVB (4028): Change dvb_frontend_ops to be a real field instead of a pointer field inside dvb_frontend

The dvb_frontend_ops is a pointer inside dvb_frontend. That's why every demod-driver
is having a field of dvb_frontend_ops in its private-state-struct and
using the reference for filling the pointer-field in dvb_frontend.
- It saves at least two lines of code per demod-driver,
- reduces object size (one less dereference per frontend_ops-access),
- be coherent with dvb_tuner_ops,
- makes it a little bit easier for newbies to understand how it works and
- avoids stupid mistakes because you would have to copy the dvb_frontend_ops
  always, before you could assign the static pointer directly, which was
  dangerous.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 7 insertions, 9 deletions

diff --git a/drivers/media/dvb/frontends/mt352.c b/drivers/media/dvb/frontends/mt352.c
index 8601a3f43074..5de7376c94ce 100644
--- a/drivers/media/dvb/frontends/mt352.c
+++ b/drivers/media/dvb/frontends/mt352.c
@@ -45,7 +45,6 @@
 struct mt352_state {
         struct i2c_adapter* i2c;
         struct dvb_frontend frontend;
-        struct dvb_frontend_ops ops;
 
         /* configuration settings */
         struct mt352_config config;
@@ -288,17 +287,17 @@ static int mt352_set_parameters(struct dvb_frontend* fe,
         mt352_calc_input_freq(state, buf+6);
 
         if (state->config.no_tuner) {
-                if (fe->ops->tuner_ops.set_params) {
-                        fe->ops->tuner_ops.set_params(fe, param);
-                        if (fe->ops->i2c_gate_ctrl)
-                                fe->ops->i2c_gate_ctrl(fe, 0);
+                if (fe->ops.tuner_ops.set_params) {
+                        fe->ops.tuner_ops.set_params(fe, param);
+                        if (fe->ops.i2c_gate_ctrl)
+                                fe->ops.i2c_gate_ctrl(fe, 0);
                 }
 
                 mt352_write(fe, buf, 8);
                 mt352_write(fe, fsm_go, 2);
         } else {
-                if (fe->ops->tuner_ops.calc_regs) {
-                        fe->ops->tuner_ops.calc_regs(fe, param, buf+8, 5);
+                if (fe->ops.tuner_ops.calc_regs) {
+                        fe->ops.tuner_ops.calc_regs(fe, param, buf+8, 5);
                         buf[8] <<= 1;
                         mt352_write(fe, buf, sizeof(buf));
                         mt352_write(fe, tuner_go, 2);
@@ -550,13 +549,12 @@ struct dvb_frontend* mt352_attach(const struct mt352_config* config,
         /* setup the state */
         state->i2c = i2c;
         memcpy(&state->config,config,sizeof(struct mt352_config));
-        memcpy(&state->ops, &mt352_ops, sizeof(struct dvb_frontend_ops));
 
         /* check if the demod is there */
         if (mt352_read_register(state, CHIP_ID) != ID_MT352) goto error;
 
         /* create dvb_frontend */
-        state->frontend.ops = &state->ops;
+        memcpy(&state->frontend.ops, &mt352_ops, sizeof(struct dvb_frontend_ops));
         state->frontend.demodulator_priv = state;
         return &state->frontend;