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/cx24123.c b/drivers/media/dvb/frontends/cx24123.c
index c7142296406..f2f795cba56 100644
--- a/drivers/media/dvb/frontends/cx24123.c
+++ b/drivers/media/dvb/frontends/cx24123.c
@@ -41,7 +41,6 @@ static int debug;
 struct cx24123_state
 {
 	struct i2c_adapter* i2c;
-	struct dvb_frontend_ops ops;
 	const struct cx24123_config* config;
 
 	struct dvb_frontend frontend;
@@ -429,8 +428,8 @@ static int cx24123_set_symbolrate(struct cx24123_state* state, u32 srate)
 	u8 pll_mult;
 
 	/*  check if symbol rate is within limits */
-	if ((srate > state->ops.info.symbol_rate_max) ||
-	    (srate < state->ops.info.symbol_rate_min))
+	if ((srate > state->frontend.ops.info.symbol_rate_max) ||
+	    (srate < state->frontend.ops.info.symbol_rate_min))
 		return -EOPNOTSUPP;;
 
 	/* choose the sampling rate high enough for the required operation,
@@ -950,7 +949,6 @@ struct dvb_frontend* cx24123_attach(const struct cx24123_config* config,
 	/* setup the state */
 	state->config = config;
 	state->i2c = i2c;
-	memcpy(&state->ops, &cx24123_ops, sizeof(struct dvb_frontend_ops));
 	state->lastber = 0;
 	state->snr = 0;
 	state->VCAarg = 0;
@@ -968,7 +966,7 @@ struct dvb_frontend* cx24123_attach(const struct cx24123_config* config,
 	}
 
 	/* create dvb_frontend */
-	state->frontend.ops = &state->ops;
+	memcpy(&state->frontend.ops, &cx24123_ops, sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;
 	return &state->frontend;