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>

diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index 5c132ac7647d22466c935429891bfd1ff13db444..5a2fab9fa7725cb6602924e11f67cd7ae2076b16 100644 (file)
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -2232,24 +2232,15 @@ short rtl8192_usb_initendpoints(struct net_device *dev)
        memset(priv->rx_urb, 0, sizeof(struct urb*) * MAX_RX_URB);
        priv->pp_rxskb = kcalloc(MAX_RX_URB, sizeof(struct sk_buff *),
                                 GFP_KERNEL);
-       if (priv->pp_rxskb == NULL)
-               goto destroy;
-
-       goto _middle;
-
-
-destroy:
-       kfree(priv->pp_rxskb);
-       kfree(priv->rx_urb);
-
-       priv->pp_rxskb = NULL;
-       priv->rx_urb = NULL;
-
-       DMESGE("Endpoint Alloc Failure");
-       return -ENOMEM;
+       if (!priv->pp_rxskb) {
+               kfree(priv->rx_urb);
 
+               priv->pp_rxskb = NULL;
+               priv->rx_urb = NULL;
 
-_middle:
+               DMESGE("Endpoint Alloc Failure");
+               return -ENOMEM;
+       }
 
        printk("End of initendpoints\n");
        return 0;