[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>

20 files changed, 21 insertions, 49 deletions

diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
index 7c4a50b0b963..023a7e4e6168 100644
--- a/drivers/media/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -174,12 +174,11 @@ static bool has_get_frontend(struct dvb_frontend *fe)
 	return fe->ops.get_frontend != NULL;
 }
 
-int
+void
 dvb_tuner_simple_release(struct dvb_frontend *fe)
 {
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
-	return 0;
 }
 EXPORT_SYMBOL(dvb_tuner_simple_release);
 
diff --git a/drivers/media/dvb-core/dvb_frontend.h b/drivers/media/dvb-core/dvb_frontend.h
index 6b675a833520..5bfb16bf188f 100644
--- a/drivers/media/dvb-core/dvb_frontend.h
+++ b/drivers/media/dvb-core/dvb_frontend.h
@@ -225,7 +225,7 @@ struct dvb_tuner_ops {
 
 	struct dvb_tuner_info info;
 
-	int (*release)(struct dvb_frontend *fe);
+	void (*release)(struct dvb_frontend *fe);
 	int (*init)(struct dvb_frontend *fe);
 	int (*sleep)(struct dvb_frontend *fe);
 	int (*suspend)(struct dvb_frontend *fe);
@@ -270,7 +270,7 @@ struct dvb_tuner_ops {
  * A common default implementation for dvb_tuner_ops.release.  All it
  * does is kfree() the tuner_priv and assign NULL to it.
  */
-int
+void
 dvb_tuner_simple_release(struct dvb_frontend *fe);
 
 /**
diff --git a/drivers/media/dvb-frontends/ascot2e.c b/drivers/media/dvb-frontends/ascot2e.c
index ad304eed656d..0ee0df53b91b 100644
--- a/drivers/media/dvb-frontends/ascot2e.c
+++ b/drivers/media/dvb-frontends/ascot2e.c
@@ -254,14 +254,13 @@ static int ascot2e_init(struct dvb_frontend *fe)
 	return ascot2e_leave_power_save(priv);
 }
 
-static int ascot2e_release(struct dvb_frontend *fe)
+static void ascot2e_release(struct dvb_frontend *fe)
 {
 	struct ascot2e_priv *priv = fe->tuner_priv;
 
 	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
-	return 0;
 }
 
 static int ascot2e_sleep(struct dvb_frontend *fe)
diff --git a/drivers/media/dvb-frontends/cx24113.c b/drivers/media/dvb-frontends/cx24113.c
index 3812ef8cac08..db44ebb7c561 100644
--- a/drivers/media/dvb-frontends/cx24113.c
+++ b/drivers/media/dvb-frontends/cx24113.c
@@ -527,13 +527,12 @@ static int cx24113_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 	return 0;
 }
 
-static int cx24113_release(struct dvb_frontend *fe)
+static void cx24113_release(struct dvb_frontend *fe)
 {
 	struct cx24113_state *state = fe->tuner_priv;
 	dprintk("\n");
 	fe->tuner_priv = NULL;
 	kfree(state);
-	return 0;
 }
 
 static const struct dvb_tuner_ops cx24113_tuner_ops = {
diff --git a/drivers/media/dvb-frontends/helene.c b/drivers/media/dvb-frontends/helene.c
index dc43c5f6d0ea..ef35c2b30ea3 100644
--- a/drivers/media/dvb-frontends/helene.c
+++ b/drivers/media/dvb-frontends/helene.c
@@ -434,14 +434,13 @@ static int helene_init(struct dvb_frontend *fe)
 	return helene_leave_power_save(priv);
 }
 
-static int helene_release(struct dvb_frontend *fe)
+static void helene_release(struct dvb_frontend *fe)
 {
 	struct helene_priv *priv = fe->tuner_priv;
 
 	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
-	return 0;
 }
 
 static int helene_sleep(struct dvb_frontend *fe)
diff --git a/drivers/media/dvb-frontends/horus3a.c b/drivers/media/dvb-frontends/horus3a.c
index 0c089b5986a1..94bb4f7a2298 100644
--- a/drivers/media/dvb-frontends/horus3a.c
+++ b/drivers/media/dvb-frontends/horus3a.c
@@ -151,14 +151,13 @@ static int horus3a_init(struct dvb_frontend *fe)
 	return 0;
 }
 
-static int horus3a_release(struct dvb_frontend *fe)
+static void horus3a_release(struct dvb_frontend *fe)
 {
 	struct horus3a_priv *priv = fe->tuner_priv;
 
 	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
-	return 0;
 }
 
 static int horus3a_sleep(struct dvb_frontend *fe)
diff --git a/drivers/media/dvb-frontends/ts2020.c b/drivers/media/dvb-frontends/ts2020.c
index a9f6bbea6df3..931e5c98da8a 100644
--- a/drivers/media/dvb-frontends/ts2020.c
+++ b/drivers/media/dvb-frontends/ts2020.c
@@ -56,7 +56,7 @@ struct ts2020_reg_val {
 
 static void ts2020_stat_work(struct work_struct *work);
 
-static int ts2020_release(struct dvb_frontend *fe)
+static void ts2020_release(struct dvb_frontend *fe)
 {
 	struct ts2020_priv *priv = fe->tuner_priv;
 	struct i2c_client *client = priv->client;
@@ -64,7 +64,6 @@ static int ts2020_release(struct dvb_frontend *fe)
 	dev_dbg(&client->dev, "\n");
 
 	i2c_unregister_device(client);
-	return 0;
 }
 
 static int ts2020_sleep(struct dvb_frontend *fe)
diff --git a/drivers/media/dvb-frontends/zl10039.c b/drivers/media/dvb-frontends/zl10039.c
index d6ded11fee49..60a2954f8ff8 100644
--- a/drivers/media/dvb-frontends/zl10039.c
+++ b/drivers/media/dvb-frontends/zl10039.c
@@ -244,14 +244,13 @@ error:
 	return ret;
 }
 
-static int zl10039_release(struct dvb_frontend *fe)
+static void zl10039_release(struct dvb_frontend *fe)
 {
 	struct zl10039_state *state = fe->tuner_priv;
 
 	dprintk("%s\n", __func__);
 	kfree(state);
 	fe->tuner_priv = NULL;
-	return 0;
 }
 
 static const struct dvb_tuner_ops zl10039_ops = {
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)
diff --git a/drivers/media/usb/dvb-usb-v2/mxl111sf-tuner.c b/drivers/media/usb/dvb-usb-v2/mxl111sf-tuner.c
index f141dcc55cc9..f84bef6034dc 100644
--- a/drivers/media/usb/dvb-usb-v2/mxl111sf-tuner.c
+++ b/drivers/media/usb/dvb-usb-v2/mxl111sf-tuner.c
@@ -455,13 +455,12 @@ static int mxl111sf_tuner_get_if_frequency(struct dvb_frontend *fe,
 	return 0;
 }
 
-static int mxl111sf_tuner_release(struct dvb_frontend *fe)
+static void mxl111sf_tuner_release(struct dvb_frontend *fe)
 {
 	struct mxl111sf_tuner_state *state = fe->tuner_priv;
 	mxl_dbg("()");
 	kfree(state);
 	fe->tuner_priv = NULL;
-	return 0;
 }
 
 /* ------------------------------------------------------------------------- */