[media] dvb_frontend: pass the props cache to get_frontend() as arg

Instead of using the DTV properties cache directly, pass the get
frontend data as an argument. For now, everything should remain
the same, but the next patch will prevent get_frontend to
affect the global cache.

This is needed because several drivers don't care enough to only
change the properties if locked. Due to that, calling
G_PROPERTY before locking on those drivers will make them to
never lock. Ok, those drivers are crap and should never be
merged like that, but the core should not rely that the drivers
would be doing the right thing.

Reviewed-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 12 insertions, 11 deletions

diff --git a/drivers/media/dvb-frontends/dib9000.c b/drivers/media/dvb-frontends/dib9000.c
index 91888a2f5301..bab8c5a980a2 100644
--- a/drivers/media/dvb-frontends/dib9000.c
+++ b/drivers/media/dvb-frontends/dib9000.c
@@ -1889,7 +1889,8 @@ static int dib9000_fe_get_tune_settings(struct dvb_frontend *fe, struct dvb_fron
 	return 0;
 }
 
-static int dib9000_get_frontend(struct dvb_frontend *fe)
+static int dib9000_get_frontend(struct dvb_frontend *fe,
+				struct dtv_frontend_properties *c)
 {
 	struct dib9000_state *state = fe->demodulator_priv;
 	u8 index_frontend, sub_index_frontend;
@@ -1909,7 +1910,7 @@ static int dib9000_get_frontend(struct dvb_frontend *fe)
 			dprintk("TPS lock on the slave%i", index_frontend);
 
 			/* synchronize the cache with the other frontends */
-			state->fe[index_frontend]->ops.get_frontend(state->fe[index_frontend]);
+			state->fe[index_frontend]->ops.get_frontend(state->fe[index_frontend], c);
 			for (sub_index_frontend = 0; (sub_index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[sub_index_frontend] != NULL);
 			     sub_index_frontend++) {
 				if (sub_index_frontend != index_frontend) {
@@ -1943,14 +1944,14 @@ static int dib9000_get_frontend(struct dvb_frontend *fe)
 
 	/* synchronize the cache with the other frontends */
 	for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
-		state->fe[index_frontend]->dtv_property_cache.inversion = fe->dtv_property_cache.inversion;
-		state->fe[index_frontend]->dtv_property_cache.transmission_mode = fe->dtv_property_cache.transmission_mode;
-		state->fe[index_frontend]->dtv_property_cache.guard_interval = fe->dtv_property_cache.guard_interval;
-		state->fe[index_frontend]->dtv_property_cache.modulation = fe->dtv_property_cache.modulation;
-		state->fe[index_frontend]->dtv_property_cache.hierarchy = fe->dtv_property_cache.hierarchy;
-		state->fe[index_frontend]->dtv_property_cache.code_rate_HP = fe->dtv_property_cache.code_rate_HP;
-		state->fe[index_frontend]->dtv_property_cache.code_rate_LP = fe->dtv_property_cache.code_rate_LP;
-		state->fe[index_frontend]->dtv_property_cache.rolloff = fe->dtv_property_cache.rolloff;
+		state->fe[index_frontend]->dtv_property_cache.inversion = c->inversion;
+		state->fe[index_frontend]->dtv_property_cache.transmission_mode = c->transmission_mode;
+		state->fe[index_frontend]->dtv_property_cache.guard_interval = c->guard_interval;
+		state->fe[index_frontend]->dtv_property_cache.modulation = c->modulation;
+		state->fe[index_frontend]->dtv_property_cache.hierarchy = c->hierarchy;
+		state->fe[index_frontend]->dtv_property_cache.code_rate_HP = c->code_rate_HP;
+		state->fe[index_frontend]->dtv_property_cache.code_rate_LP = c->code_rate_LP;
+		state->fe[index_frontend]->dtv_property_cache.rolloff = c->rolloff;
 	}
 	ret = 0;
 
@@ -2083,7 +2084,7 @@ static int dib9000_set_frontend(struct dvb_frontend *fe)
 
 	/* synchronize all the channel cache */
 	state->get_frontend_internal = 1;
-	dib9000_get_frontend(state->fe[0]);
+	dib9000_get_frontend(state->fe[0], &state->fe[0]->dtv_property_cache);
 	state->get_frontend_internal = 0;
 
 	/* retune the other frontends with the found channel */