dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

drivers/staging/gdm72xx/gdm_sdio.c: Remove 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Senna Tschudin 2012-09-12 17:06:44 +02:00 committed by Greg Kroah-Hartman
parent 2e464f0068
commit 47ad3428a1
1 changed files with 2 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/staging/gdm72xx/gdm_sdio.c
View File

@ -94,17 +94,14 @@ static struct sdio_rx *alloc_rx_struct(struct rx_cxt *rx)
struct sdio_rx *r = NULL;
r = kmalloc(sizeof(*r), GFP_ATOMIC);
if (r == NULL)
goto out;
if (!r)
return NULL;
memset(r, 0, sizeof(*r));
r->rx_cxt = rx;
return r;
out:
kfree(r);
return NULL;
}
static void free_rx_struct(struct sdio_rx *r)