[PATCH] net/mlx4_core: Add missed mlx4_free_cmd_mailbox()

[Chuhong Yuan]

mlx4_do_mirror_rule() forgets to call mlx4_free_cmd_mailbox() to
free the memory region allocated by mlx4_alloc_cmd_mailbox() before
an exit.
Add the missed call to fix it.

Fixes: 78efed275117 ("net/mlx4_core: Support mirroring VF DMFS rules on both 
ports")
Signed-off-by: Chuhong Yuan <hsleste...@gmail.com>
---
 drivers/net/ethernet/mellanox/mlx4/resource_tracker.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c 
b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
index 394f43add85c..a99e71bc7b3c 100644
--- a/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
+++ b/drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
@@ -4986,6 +4986,7 @@ static int mlx4_do_mirror_rule(struct mlx4_dev *dev, 
struct res_fs_rule *fs_rule
 
        if (!fs_rule->mirr_mbox) {
                mlx4_err(dev, "rule mirroring mailbox is null\n");
+               mlx4_free_cmd_mailbox(dev, mailbox);
                return -EINVAL;
        }
        memcpy(mailbox->buf, fs_rule->mirr_mbox, fs_rule->mirr_mbox_size);
-- 
2.27.0