[POWERPC] arch/powerpc/platforms/pseries: Add missing of_node_put

Author: Julia Lawall <julia@diku.dk>

Of_get_parent and of_find_compatible_node do an of_node_get, and thus a
corresponding of_code_put is needed in the error case.

The problem was found using the following semantic match.
(http://www.emn.fr/x-info/coccinelle/)

// 
@@
type T,T1,T2;
identifier E;
statement S;
expression x1,x2,x3;
int ret;
@@

  T E;
  ...
* E = \(of_get_parent\|of_find_compatible_node\)(...);
  if (E == NULL) S
  ... when != of_node_put(...,(T1)E,...)
      when != if (E != NULL) { ... of_node_put(...,(T1)E,...); ...}
      when != x1 = (T1)E
      when != E = x3;
      when any
  if (...) {
    ... when != of_node_put(...,(T2)E,...)
        when != if (E != NULL) { ... of_node_put(...,(T2)E,...); ...}
        when != x2 = (T2)E
(
*   return;
|
*   return ret;
)
  }
// 

Signed-off-by: Julia Lawall 
Cc: Stephen Rothwell 
Cc: Benjamin Herrenschmidt 
Cc: Kumar Gala 
Signed-off-by: Andrew Morton 
Signed-off-by: Paul Mackerras 

---
 arch/powerpc/platforms/pseries/reconfig.c | 1 +
 1 file changed, 1 insertion(+)
 
diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c
index c02f874..2800fce 100644
--- a/arch/powerpc/platforms/pseries/reconfig.c
+++ b/arch/powerpc/platforms/pseries/reconfig.c
@@ -167,6 +167,7 @@ static int pSeries_reconfig_remove_node(struct device_node *np)
 
 	if ((child = of_get_next_child(np, NULL))) {
 		of_node_put(child);
+		of_node_put(parent);
 		return -EBUSY;
 	}