[PATCH 4.9 125/144] staging: lustre: ldlm: free resource when ldlm_lock_create() fails.

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: NeilBrown <neilb@xxxxxxxx>

[ Upstream commit d8caf662b4aeeb2ac83ac0b22e40db88e9360c77 ]

ldlm_lock_create() gets a resource, but don't put it on
all failure paths. It should.

Signed-off-by: NeilBrown <neilb@xxxxxxxx>
Reviewed-by: James Simmons <jsimmons@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/staging/lustre/lustre/ldlm/ldlm_lock.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_lock.c
@@ -1489,8 +1489,10 @@ struct ldlm_lock *ldlm_lock_create(struc
 		return ERR_CAST(res);
 
 	lock = ldlm_lock_new(res);
-	if (!lock)
+	if (!lock) {
+		ldlm_resource_putref(res);
 		return ERR_PTR(-ENOMEM);
+	}
 
 	lock->l_req_mode = mode;
 	lock->l_ast_data = data;
@@ -1533,6 +1535,8 @@ out:
 	return ERR_PTR(rc);
 }
 
+
+
 /**
  * Enqueue (request) a lock.
  * On the client this is called from ldlm_cli_enqueue_fini