Commit 3f037426 authored by Peter Senna Tschudin's avatar Peter Senna Tschudin Committed by Mauro Carvalho Chehab

[media] drivers/media/dvb-frontends/dvb_dummy_fe.c: Removes useless kfree()

Remove useless kfree() and clean up code related to the removal.
The semantic patch that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
position p1,p2;
expression x;
@@
if (x@p1 == NULL) { ... kfree@p2(x); ... return ...; }
@unchanged exists@
position r.p1,r.p2;
expression e <= r.x,x,e1;
iterator I;
statement S;
@@
if (x@p1 == NULL) { ... when != I(x,...) S
                        when != e = e1
                        when != e += e1
                        when != e -= e1
                        when != ++e
                        when != --e
                        when != e++
                        when != e--
                        when != &e
   kfree@p2(x); ... return ...; }
@ok depends on unchanged exists@
position any r.p1;
position r.p2;
expression x;
@@
... when != true x@p1 == NULL
kfree@p2(x);
@depends on !ok && unchanged@
position r.p2;
expression x;
@@
*kfree@p2(x);
// </smpl>
Signed-off-by: default avatarPeter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 5f49908a
...@@ -121,16 +121,13 @@ struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void) ...@@ -121,16 +121,13 @@ struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
/* allocate memory for the internal state */ /* allocate memory for the internal state */
state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL); state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
if (state == NULL) goto error; if (!state)
return NULL;
/* create dvb_frontend */ /* create dvb_frontend */
memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops)); memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state; state->frontend.demodulator_priv = state;
return &state->frontend; return &state->frontend;
error:
kfree(state);
return NULL;
} }
static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops; static struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;
...@@ -141,16 +138,13 @@ struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void) ...@@ -141,16 +138,13 @@ struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void)
/* allocate memory for the internal state */ /* allocate memory for the internal state */
state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL); state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
if (state == NULL) goto error; if (!state)
return NULL;
/* create dvb_frontend */ /* create dvb_frontend */
memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops)); memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state; state->frontend.demodulator_priv = state;
return &state->frontend; return &state->frontend;
error:
kfree(state);
return NULL;
} }
static struct dvb_frontend_ops dvb_dummy_fe_qam_ops; static struct dvb_frontend_ops dvb_dummy_fe_qam_ops;
...@@ -161,16 +155,13 @@ struct dvb_frontend *dvb_dummy_fe_qam_attach(void) ...@@ -161,16 +155,13 @@ struct dvb_frontend *dvb_dummy_fe_qam_attach(void)
/* allocate memory for the internal state */ /* allocate memory for the internal state */
state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL); state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
if (state == NULL) goto error; if (!state)
return NULL;
/* create dvb_frontend */ /* create dvb_frontend */
memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops)); memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state; state->frontend.demodulator_priv = state;
return &state->frontend; return &state->frontend;
error:
kfree(state);
return NULL;
} }
static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = { static struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
......
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