drivers/staging/rtl8192u/r8192U_core.c: Remove useless kfree
authorPeter Senna Tschudin <peter.senna@gmail.com>
Wed, 12 Sep 2012 15:06:43 +0000 (17:06 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 12 Sep 2012 16:43:45 +0000 (09:43 -0700)
commit2e464f00687931eeeab95c90e3796609d0c8ce4c
tree07323d6e4281b6208c8004cb0ba8a37f26ea3ff4
parente66fc1fba248738d32f3b64508f9ef1176d9e767
drivers/staging/rtl8192u/r8192U_core.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>
drivers/staging/rtl8192u/r8192U_core.c