[PATCH 1/9] drivers/block/aoe/aoecmd.c: Remove useless kfree

Peter Senna Tschudin
2012-09-12T15:07:19Z

From: Peter Senna Tschudin <peter.senna@gmail.com>

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>

---
drivers/block/aoe/aoecmd.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 5461faa..cbb0521 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -1257,7 +1257,6 @@ addtgt(struct aoedev *d, char *addr, ulong nframes)
}
t = kcalloc(1, sizeof *t, GFP_ATOMIC);
if (!t) {
- kfree(t);
printk(KERN_INFO "aoe: cannot allocate memory to add target\n");
return NULL;
}