From: Peter Senna Tschudin <peter.senna@gmail.com>
Date: Wed, 12 Sep 2012 11:56:02 +0000 (-0300)
Subject: [media] drivers/media/dvb-frontends/s5h1432.c: Removes useless kfree()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=47aab4ab20259526419712df4c5d98b914d968dc;p=linux-beck.git

[media] drivers/media/dvb-frontends/s5h1432.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: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/dvb-frontends/s5h1432.c b/drivers/media/dvb-frontends/s5h1432.c
index 8352ce1c9556..6ec16a243741 100644
--- a/drivers/media/dvb-frontends/s5h1432.c
+++ b/drivers/media/dvb-frontends/s5h1432.c
@@ -351,8 +351,8 @@ struct dvb_frontend *s5h1432_attach(const struct s5h1432_config *config,
 	printk(KERN_INFO " Enter s5h1432_attach(). attach success!\n");
 	/* allocate memory for the internal state */
 	state = kmalloc(sizeof(struct s5h1432_state), GFP_KERNEL);
-	if (state == NULL)
-		goto error;
+	if (!state)
+		return NULL;
 
 	/* setup the state */
 	state->config = config;
@@ -367,10 +367,6 @@ struct dvb_frontend *s5h1432_attach(const struct s5h1432_config *config,
 	state->frontend.demodulator_priv = state;
 
 	return &state->frontend;
-
-error:
-	kfree(state);
-	return NULL;
 }
 EXPORT_SYMBOL(s5h1432_attach);