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, 3 insertions, 5 deletions

diff --git a/drivers/media/dvb/frontends/nxt200x.c b/drivers/media/dvb/frontends/nxt200x.c
index 9b13f14..55671cb 100644
--- a/drivers/media/dvb/frontends/nxt200x.c
+++ b/drivers/media/dvb/frontends/nxt200x.c
@@ -55,7 +55,6 @@
 struct nxt200x_state {
 
 	struct i2c_adapter* i2c;
-	struct dvb_frontend_ops ops;
 	const struct nxt200x_config* config;
 	struct dvb_frontend frontend;
 
@@ -548,8 +547,8 @@ static int nxt200x_setup_frontend_parameters (struct dvb_frontend* fe,
 	}
 
 	/* get tuning information */
-	if (fe->ops->tuner_ops.calc_regs) {
-		fe->ops->tuner_ops.calc_regs(fe, p, buf, 5);
+	if (fe->ops.tuner_ops.calc_regs) {
+		fe->ops.tuner_ops.calc_regs(fe, p, buf, 5);
 	}
 
 	/* set additional params */
@@ -1161,7 +1160,6 @@ struct dvb_frontend* nxt200x_attach(const struct nxt200x_config* config,
 	/* setup the state */
 	state->config = config;
 	state->i2c = i2c;
-	memcpy(&state->ops, &nxt200x_ops, sizeof(struct dvb_frontend_ops));
 	state->initialised = 0;
 
 	/* read card id */
@@ -1200,7 +1198,7 @@ struct dvb_frontend* nxt200x_attach(const struct nxt200x_config* config,
 	}
 
 	/* create dvb_frontend */
-	state->frontend.ops = &state->ops;
+	memcpy(&state->frontend.ops, &nxt200x_ops, sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;
 	return &state->frontend;