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, 13 deletions

diff --git a/drivers/media/dvb/frontends/dvb_dummy_fe.c b/drivers/media/dvb/frontends/dvb_dummy_fe.c
index 78ea4ff03e68..6271b1e7f6ab 100644
--- a/drivers/media/dvb/frontends/dvb_dummy_fe.c
+++ b/drivers/media/dvb/frontends/dvb_dummy_fe.c
@@ -30,7 +30,6 @@
 
 
 struct dvb_dummy_fe_state {
-	struct dvb_frontend_ops ops;
 	struct dvb_frontend frontend;
 };
 
@@ -121,11 +120,8 @@ struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
 	state = kmalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 	if (state == NULL) goto error;
 
-	/* setup the state */
-	memcpy(&state->ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
-
 	/* create dvb_frontend */
-	state->frontend.ops = &state->ops;
+	memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;
 	return &state->frontend;
 
@@ -144,11 +140,8 @@ struct dvb_frontend* dvb_dummy_fe_qpsk_attach()
 	state = kmalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 	if (state == NULL) goto error;
 
-	/* setup the state */
-	memcpy(&state->ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
-
 	/* create dvb_frontend */
-	state->frontend.ops = &state->ops;
+	memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;
 	return &state->frontend;
 
@@ -167,11 +160,8 @@ struct dvb_frontend* dvb_dummy_fe_qam_attach()
 	state = kmalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
 	if (state == NULL) goto error;
 
-	/* setup the state */
-	memcpy(&state->ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
-
 	/* create dvb_frontend */
-	state->frontend.ops = &state->ops;
+	memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;
 	return &state->frontend;