[GFS2] return conflicts for GETLK

We weren't returning the correct result when GETLK found a conflict,
which is indicated by userspace passing back a 1.

Signed-off-by: Abhijith Das <adas redhat com>
Signed-off-by: David Teigland <teigland redhat com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/gfs2/locking/dlm/plock.c b/fs/gfs2/locking/dlm/plock.c
index 1dc76805dd45..fba1f1d87e4f 100644
--- a/fs/gfs2/locking/dlm/plock.c
+++ b/fs/gfs2/locking/dlm/plock.c
@@ -254,16 +254,20 @@ int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
         }
         spin_unlock(&ops_lock);
 
+        /* info.rv from userspace is 1 for conflict, 0 for no-conflict,
+           -ENOENT if there are no locks on the file */
+
         rv = op->info.rv;
 
         fl->fl_type = F_UNLCK;
         if (rv == -ENOENT)
                 rv = 0;
-        else if (rv == 0 && op->info.pid != fl->fl_pid) {
+        else if (rv > 0) {
                 fl->fl_type = (op->info.ex) ? F_WRLCK : F_RDLCK;
                 fl->fl_pid = op->info.pid;
                 fl->fl_start = op->info.start;
                 fl->fl_end = op->info.end;
+                rv = 0;
         }
 
         kfree(op);