net/rfkill/rfkill-gpio.c: introduce missing kfree

Error handling code following a kmalloc should free the allocated data.
The label fail_alloc already does this for rfkill.

A simplified version of the semantic match that finds the problem is as
follows: (http://coccinelle.lip6.fr)

// <smpl>
@r exists@
local idexpression x;
statement S;
identifier f1;
position p1,p2;
expression *ptr != NULL;
@@

x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
<... when != x
     when != if (...) { <+...x...+> }
x->f1
...>
(
 return \(0\|<+...x...+>\|ptr\);
|
 return@p2 ...;
)

@script:python@
p1 << r.p1;
p2 << r.p2;
@@

print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c
index ca355e7e58b4..865adb61685a 100644
--- a/net/rfkill/rfkill-gpio.c
+++ b/net/rfkill/rfkill-gpio.c
@@ -105,7 +105,7 @@ static int rfkill_gpio_probe(struct platform_device *pdev)
                 ret = pdata->gpio_runtime_setup(pdev);
                 if (ret) {
                         pr_warn("%s: can't set up gpio\n", __func__);
-                        return ret;
+                        goto fail_alloc;
                 }
         }