V4L/DVB (10662): remove redundant memset after kzalloc

Hi there!

While having a look at the allocation of struct dvb_frontend in *_attach
functions, I found some cases calling memset after kzalloc. This is
redundant, and the attached patch removes these calls.
I also changed one case calling kmalloc and memset to kzalloc.

Regards
Matthias

Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/cx24113.c

@@ -559,7 +559,7 @@ struct dvb_frontend *cx24113_attach(struct dvb_frontend *fe,
 		kzalloc(sizeof(struct cx24113_state), GFP_KERNEL);
 	int rc;
 	if (state == NULL) {
-		err("Unable to kmalloc\n");
+		err("Unable to kzalloc\n");
 		goto error;
 	}
 

drivers/media/dvb/frontends/cx24116.c

@@ -1112,13 +1112,10 @@ struct dvb_frontend *cx24116_attach(const struct cx24116_config *config,
 	dprintk("%s\n", __func__);
 
 	/* allocate memory for the internal state */
-	state = kmalloc(sizeof(struct cx24116_state), GFP_KERNEL);
+	state = kzalloc(sizeof(struct cx24116_state), GFP_KERNEL);
 	if (state == NULL)
 		goto error1;
 
-	/* setup the state */
-	memset(state, 0, sizeof(struct cx24116_state));
-
 	state->config = config;
 	state->i2c = i2c;
 

drivers/media/dvb/frontends/cx24123.c

@@ -1069,13 +1069,13 @@ static struct dvb_frontend_ops cx24123_ops;
 struct dvb_frontend *cx24123_attach(const struct cx24123_config *config,
 				    struct i2c_adapter *i2c)
 {
+	/* allocate memory for the internal state */
 	struct cx24123_state *state =
 		kzalloc(sizeof(struct cx24123_state), GFP_KERNEL);
 
 	dprintk("\n");
-	/* allocate memory for the internal state */
 	if (state == NULL) {
-		err("Unable to kmalloc\n");
+		err("Unable to kzalloc\n");
 		goto error;
 	}
 

drivers/media/dvb/frontends/lgdt3304.c

@@ -363,7 +363,6 @@ struct dvb_frontend* lgdt3304_attach(const struct lgdt3304_config *config,
 
 	struct lgdt3304_state *state;
 	state = kzalloc(sizeof(struct lgdt3304_state), GFP_KERNEL);
-	memset(state, 0x0, sizeof(struct lgdt3304_state));
 	state->addr = config->i2c_address;
 	state->i2c = i2c;
 

drivers/media/dvb/frontends/s921_module.c

@@ -169,7 +169,6 @@ struct dvb_frontend* s921_attach(const struct s921_config *config,
 
 	struct s921_state *state;
 	state = kzalloc(sizeof(struct s921_state), GFP_KERNEL);
-	memset(state, 0x0, sizeof(struct s921_state));
 
 	state->addr = config->i2c_address;
 	state->i2c = i2c;