[media] dvb_frontend: tuner_ops.release returns void

It is not clear what this return value means.  All implemenations
return 0, and the one caller ignores the value.  Let's remove this
useless return value completely.

Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

11 files changed, 11 insertions, 31 deletions

diff --git a/drivers/media/tuners/max2165.c b/drivers/media/tuners/max2165.c
index 353b178becf6..c3f10925b0d4 100644
--- a/drivers/media/tuners/max2165.c
+++ b/drivers/media/tuners/max2165.c
@@ -370,15 +370,13 @@ static int max2165_init(struct dvb_frontend *fe)
 	return 0;
 }
 
-static int max2165_release(struct dvb_frontend *fe)
+static void max2165_release(struct dvb_frontend *fe)
 {
 	struct max2165_priv *priv = fe->tuner_priv;
 	dprintk("%s()\n", __func__);
 
 	kfree(priv);
 	fe->tuner_priv = NULL;
-
-	return 0;
 }
 
 static const struct dvb_tuner_ops max2165_tuner_ops = {
diff --git a/drivers/media/tuners/mt2063.c b/drivers/media/tuners/mt2063.c
index dfec23743afe..8b39d8dc97a0 100644
--- a/drivers/media/tuners/mt2063.c
+++ b/drivers/media/tuners/mt2063.c
@@ -2019,7 +2019,7 @@ static int mt2063_get_status(struct dvb_frontend *fe, u32 *tuner_status)
 	return 0;
 }
 
-static int mt2063_release(struct dvb_frontend *fe)
+static void mt2063_release(struct dvb_frontend *fe)
 {
 	struct mt2063_state *state = fe->tuner_priv;
 
@@ -2027,8 +2027,6 @@ static int mt2063_release(struct dvb_frontend *fe)
 
 	fe->tuner_priv = NULL;
 	kfree(state);
-
-	return 0;
 }
 
 static int mt2063_set_analog_params(struct dvb_frontend *fe,
diff --git a/drivers/media/tuners/mt2131.c b/drivers/media/tuners/mt2131.c
index 6e2cdd2b6175..e7790e4afcfe 100644
--- a/drivers/media/tuners/mt2131.c
+++ b/drivers/media/tuners/mt2131.c
@@ -230,12 +230,11 @@ static int mt2131_init(struct dvb_frontend *fe)
 	return ret;
 }
 
-static int mt2131_release(struct dvb_frontend *fe)
+static void mt2131_release(struct dvb_frontend *fe)
 {
 	dprintk(1, "%s()\n", __func__);
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
-	return 0;
 }
 
 static const struct dvb_tuner_ops mt2131_tuner_ops = {
diff --git a/drivers/media/tuners/mxl5005s.c b/drivers/media/tuners/mxl5005s.c
index 92a3be4fde87..353744fee053 100644
--- a/drivers/media/tuners/mxl5005s.c
+++ b/drivers/media/tuners/mxl5005s.c
@@ -4063,12 +4063,11 @@ static int mxl5005s_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 	return 0;
 }
 
-static int mxl5005s_release(struct dvb_frontend *fe)
+static void mxl5005s_release(struct dvb_frontend *fe)
 {
 	dprintk(1, "%s()\n", __func__);
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
-	return 0;
 }
 
 static const struct dvb_tuner_ops mxl5005s_tuner_ops = {
diff --git a/drivers/media/tuners/mxl5007t.c b/drivers/media/tuners/mxl5007t.c
index 42569c6811e6..b16dfa5e85fb 100644
--- a/drivers/media/tuners/mxl5007t.c
+++ b/drivers/media/tuners/mxl5007t.c
@@ -776,7 +776,7 @@ static int mxl5007t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 	return 0;
 }
 
-static int mxl5007t_release(struct dvb_frontend *fe)
+static void mxl5007t_release(struct dvb_frontend *fe)
 {
 	struct mxl5007t_state *state = fe->tuner_priv;
 
@@ -788,8 +788,6 @@ static int mxl5007t_release(struct dvb_frontend *fe)
 	mutex_unlock(&mxl5007t_list_mutex);
 
 	fe->tuner_priv = NULL;
-
-	return 0;
 }
 
 /* ------------------------------------------------------------------------- */
diff --git a/drivers/media/tuners/r820t.c b/drivers/media/tuners/r820t.c
index 08dca40356d2..ba80376a3b86 100644
--- a/drivers/media/tuners/r820t.c
+++ b/drivers/media/tuners/r820t.c
@@ -2286,7 +2286,7 @@ static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 	return 0;
 }
 
-static int r820t_release(struct dvb_frontend *fe)
+static void r820t_release(struct dvb_frontend *fe)
 {
 	struct r820t_priv *priv = fe->tuner_priv;
 
@@ -2300,8 +2300,6 @@ static int r820t_release(struct dvb_frontend *fe)
 	mutex_unlock(&r820t_list_mutex);
 
 	fe->tuner_priv = NULL;
-
-	return 0;
 }
 
 static const struct dvb_tuner_ops r820t_tuner_ops = {
diff --git a/drivers/media/tuners/tda18271-fe.c b/drivers/media/tuners/tda18271-fe.c
index a4730610c0c6..b4e5fa2ff5e5 100644
--- a/drivers/media/tuners/tda18271-fe.c
+++ b/drivers/media/tuners/tda18271-fe.c
@@ -1048,7 +1048,7 @@ fail:
 	return ret;
 }
 
-static int tda18271_release(struct dvb_frontend *fe)
+static void tda18271_release(struct dvb_frontend *fe)
 {
 	struct tda18271_priv *priv = fe->tuner_priv;
 
@@ -1060,8 +1060,6 @@ static int tda18271_release(struct dvb_frontend *fe)
 	mutex_unlock(&tda18271_list_mutex);
 
 	fe->tuner_priv = NULL;
-
-	return 0;
 }
 
 static int tda18271_get_frequency(struct dvb_frontend *fe, u32 *frequency)
diff --git a/drivers/media/tuners/tuner-simple.c b/drivers/media/tuners/tuner-simple.c
index 315f45cd0778..3339b13dd3f5 100644
--- a/drivers/media/tuners/tuner-simple.c
+++ b/drivers/media/tuners/tuner-simple.c
@@ -1001,7 +1001,7 @@ static int simple_sleep(struct dvb_frontend *fe)
 	return 0;
 }
 
-static int simple_release(struct dvb_frontend *fe)
+static void simple_release(struct dvb_frontend *fe)
 {
 	struct tuner_simple_priv *priv = fe->tuner_priv;
 
@@ -1013,8 +1013,6 @@ static int simple_release(struct dvb_frontend *fe)
 	mutex_unlock(&tuner_simple_list_mutex);
 
 	fe->tuner_priv = NULL;
-
-	return 0;
 }
 
 static int simple_get_frequency(struct dvb_frontend *fe, u32 *frequency)
diff --git a/drivers/media/tuners/tuner-xc2028.c b/drivers/media/tuners/tuner-xc2028.c
index e07c5fb59cc6..1a9665404ada 100644
--- a/drivers/media/tuners/tuner-xc2028.c
+++ b/drivers/media/tuners/tuner-xc2028.c
@@ -1321,7 +1321,7 @@ static int xc2028_sleep(struct dvb_frontend *fe)
 	return rc;
 }
 
-static int xc2028_dvb_release(struct dvb_frontend *fe)
+static void xc2028_dvb_release(struct dvb_frontend *fe)
 {
 	struct xc2028_data *priv = fe->tuner_priv;
 
@@ -1342,8 +1342,6 @@ static int xc2028_dvb_release(struct dvb_frontend *fe)
 	mutex_unlock(&xc2028_list_mutex);
 
 	fe->tuner_priv = NULL;
-
-	return 0;
 }
 
 static int xc2028_get_frequency(struct dvb_frontend *fe, u32 *frequency)
diff --git a/drivers/media/tuners/xc4000.c b/drivers/media/tuners/xc4000.c
index ac98dea985c8..03eef9b87a24 100644
--- a/drivers/media/tuners/xc4000.c
+++ b/drivers/media/tuners/xc4000.c
@@ -1618,7 +1618,7 @@ static int xc4000_init(struct dvb_frontend *fe)
 	return 0;
 }
 
-static int xc4000_release(struct dvb_frontend *fe)
+static void xc4000_release(struct dvb_frontend *fe)
 {
 	struct xc4000_priv *priv = fe->tuner_priv;
 
@@ -1632,8 +1632,6 @@ static int xc4000_release(struct dvb_frontend *fe)
 	mutex_unlock(&xc4000_list_mutex);
 
 	fe->tuner_priv = NULL;
-
-	return 0;
 }
 
 static const struct dvb_tuner_ops xc4000_tuner_ops = {
diff --git a/drivers/media/tuners/xc5000.c b/drivers/media/tuners/xc5000.c
index e6e5e90d8d95..796e7638b3b2 100644
--- a/drivers/media/tuners/xc5000.c
+++ b/drivers/media/tuners/xc5000.c
@@ -1326,7 +1326,7 @@ static int xc5000_init(struct dvb_frontend *fe)
 	return 0;
 }
 
-static int xc5000_release(struct dvb_frontend *fe)
+static void xc5000_release(struct dvb_frontend *fe)
 {
 	struct xc5000_priv *priv = fe->tuner_priv;
 
@@ -1346,8 +1346,6 @@ static int xc5000_release(struct dvb_frontend *fe)
 	mutex_unlock(&xc5000_list_mutex);
 
 	fe->tuner_priv = NULL;
-
-	return 0;
 }
 
 static int xc5000_set_config(struct dvb_frontend *fe, void *priv_cfg)