fix mdmon takeover

- when we waited for the old mdmon to exit, we didn't look
  for the socket in the right place

- when we failed to find a pid file, we returned the wrong
  value (code expected <0, but got ==0).

Signed-off-by: Luca Berra <bluca@comedia.it>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/util.c b/util.c
index 5d5711c..66be82a 100644
--- a/util.c
+++ b/util.c
@@ -1478,11 +1478,11 @@ int mdmon_pid(int devnum)
 	fd = open(path, O_RDONLY | O_NOATIME, 0);
 
 	if (fd < 0)
-		return 0;
+		return -1;
 	n = read(fd, pid, 9);
 	close(fd);
 	if (n <= 0)
-		return 0;
+		return -1;
 	return atoi(pid);
 }