[S390] extmem unbalanced spin_lock.

segment save will exit with a lock held if the passed segment doesn't
exist. Any subsequent call to segment_save will lead to a deadlock.
Fix this and give up the lock before returning.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c
index 226275d5c4f6..077af5404948 100644
--- a/arch/s390/mm/extmem.c
+++ b/arch/s390/mm/extmem.c
@@ -563,8 +563,9 @@ segment_save(char *name)
         seg = segment_by_name (name);
 
         if (seg == NULL) {
-                PRINT_ERR ("could not find segment %s in segment_save, please report to linux390@de.ibm.com\n",name);
-                return;
+                PRINT_ERR("could not find segment %s in segment_save, please "
+                          "report to linux390@de.ibm.com\n", name);
+                goto out;
         }
 
         startpfn = seg->start_addr >> PAGE_SHIFT;