dlm: fix uninitialized variable for search_rsb_list callers

gcc 4.3.0 correctly emits the following warning.
search_rsb_list does not *r_ret if no dlm_rsb is found
and _search_rsb may pass the uninitialized value upstream
on the error path when both calls to search_rsb_list
return non-zero error.

The fix sets *r_ret to NULL on search_rsb_list's not-found path.

Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: David Teigland <teigland@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 7ba9586a0943..724ddac91538 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -363,6 +363,7 @@ static int search_rsb_list(struct list_head *head, char *name, int len,
                 if (len == r->res_length && !memcmp(name, r->res_name, len))
                         goto found;
         }
+        *r_ret = NULL;
         return -EBADR;
 
  found: