[PATCH 05/21] media: sp8870: coding style fixes: miscellaneous

[Stefan Herdler <herdler@xxxxxxxxxxxxxx>]

This patch fixes the following checkpatch:

ERROR:ASSIGN_IN_IF: do not use assignment in if condition
WARNING:BRACES: braces {} are not necessary for any arm of this statement
WARNING:CONST_STRUCT: struct dvb_frontend_ops should normally be const
WARNING:EXPORT_SYMBOL: EXPORT_SYMBOL(foo); should immediately follow its function/variable
CHECK:ALLOC_SIZEOF_STRUCT: Prefer kzalloc(sizeof(*state)...) over kzalloc(sizeof(struct sp8870_state)...)
CHECK:AVOID_EXTERNS: extern prototypes should be avoided in .h files
CHECK:COMPARISON_TO_NULL: Comparison to NULL could be written ...
CHECK:MULTIPLE_ASSIGNMENTS: multiple assignments should be avoided

Signed-off-by: Stefan Herdler <herdler@xxxxxxxxxxxxxx>
---
 drivers/staging/media/av7110/sp8870.c | 24 +++++++++++++-----------
 drivers/staging/media/av7110/sp8870.h |  3 +--
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/media/av7110/sp8870.c b/drivers/staging/media/av7110/sp8870.c
index 4e2a1cbd4..282beb157 100644
--- a/drivers/staging/media/av7110/sp8870.c
+++ b/drivers/staging/media/av7110/sp8870.c
@@ -59,7 +59,8 @@ static int sp8870_writereg(struct sp8870_state *state, u16 reg, u16 data)

 	int err;

-	if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
+	err = i2c_transfer(state->i2c, &msg, 1);
+	if (err != 1) {
 		dprintk ("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data);
 		return -EREMOTEIO;
 	}
@@ -123,7 +124,8 @@ static int sp8870_firmware_upload(struct sp8870_state *state, const struct firmw
 		msg.flags = 0;
 		msg.buf = tx_buf;
 		msg.len = tx_len + 2;
-		if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
+		err = i2c_transfer(state->i2c, &msg, 1);
+		if (err != 1) {
 			printk("%s: firmware upload failed!\n", __func__);
 			printk ("%s: i2c error (err == %i)\n", __func__, err);
 			return err;
@@ -245,7 +247,8 @@ static int sp8870_set_frontend_parameters(struct dvb_frontend *fe)
 	int  err;
 	u16 reg0xc05;

-	if ((err = configure_reg0xc05(p, &reg0xc05)))
+	err = configure_reg0xc05(p, &reg0xc05);
+	if (err)
 		return err;

 	// system controller stop
@@ -533,11 +536,10 @@ static int sp8870_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 {
 	struct sp8870_state *state = fe->demodulator_priv;

-	if (enable) {
+	if (enable)
 		return sp8870_writereg(state, 0x206, 0x001);
-	} else {
+	else
 		return sp8870_writereg(state, 0x206, 0x000);
-	}
 }

 static void sp8870_release(struct dvb_frontend *fe)
@@ -555,8 +557,9 @@ struct dvb_frontend *sp8870_attach(const struct sp8870_config *config,
 	struct sp8870_state *state = NULL;

 	/* allocate memory for the internal state */
-	state = kzalloc(sizeof(struct sp8870_state), GFP_KERNEL);
-	if (state == NULL) goto error;
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
+	if (!state)
+		goto error;

 	/* setup the state */
 	state->config = config;
@@ -568,7 +571,7 @@ struct dvb_frontend *sp8870_attach(const struct sp8870_config *config,
 		goto error;

 	/* create dvb_frontend */
-	memcpy(&state->frontend.ops, &sp8870_ops, sizeof(struct dvb_frontend_ops));
+	memcpy(&state->frontend.ops, &sp8870_ops, sizeof(sp8870_ops));
 	state->frontend.demodulator_priv = state;
 	return &state->frontend;

@@ -576,6 +579,7 @@ struct dvb_frontend *sp8870_attach(const struct sp8870_config *config,
 	kfree(state);
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(sp8870_attach);

 static const struct dvb_frontend_ops sp8870_ops = {
 	.delsys = { SYS_DVBT },
@@ -613,5 +617,3 @@ MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 MODULE_DESCRIPTION("Spase SP8870 DVB-T Demodulator driver");
 MODULE_AUTHOR("Juergen Peitz");
 MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL_GPL(sp8870_attach);
diff --git a/drivers/staging/media/av7110/sp8870.h b/drivers/staging/media/av7110/sp8870.h
index 2cfee1bb6..3f566671c 100644
--- a/drivers/staging/media/av7110/sp8870.h
+++ b/drivers/staging/media/av7110/sp8870.h
@@ -20,8 +20,7 @@ struct sp8870_config {
 };

 #if IS_REACHABLE(CONFIG_DVB_SP8870)
-extern struct dvb_frontend* sp8870_attach(const struct sp8870_config* config,
-					  struct i2c_adapter* i2c);
+struct dvb_frontend *sp8870_attach(const struct sp8870_config *config, struct i2c_adapter *i2c);
 #else
 static inline struct dvb_frontend *sp8870_attach(const struct sp8870_config *config,
 						 struct i2c_adapter *i2c)
--
2.34.0