drivers/macintosh/via-pmu.c: Added a missing iounmap

Author: Julia Lawall <julia@diku.dk>

The error handling code should undo the ioremap as well.

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

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

  T E;
  ...
* E = ioremap(...);
  if (E == NULL) S
  ... when != iounmap(E)
      when != if (E != NULL) { ... iounmap(E); ...}
      when != x1 = (T1)E
  if (...) {
    ... when != iounmap(E)
        when != if (E != NULL) { ... iounmap(E); ...}
        when != x2 = (T2)E
(
*   return;
|
*   return C;
|
*   return ret;
)
  }
// 

Signed-off-by: Julia Lawall 
Cc: Johannes Berg 
Cc: Olaf Hering 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 

---
 drivers/macintosh/via-pmu.c | 1 +
 1 file changed, 1 insertion(+)
 
diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index dc741d3..6123c70 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -2336,6 +2336,7 @@ powerbook_sleep_3400(void)
 	ret = pmac_suspend_devices();
 	if (ret) {
 		pbook_free_pci_save();
+		iounmap(mem_ctrl);
 		printk(KERN_ERR "Sleep rejected by devices\n");
 		return ret;
 	}