net/mlx5: Fix command entry leak in Internal Error State

Processing commands by cmd_work_handler() while already in Internal
Error State will result in entry leak, since the handler process force
completion without doorbell. Forced completion doesn't release the entry
and event completion will never arrive, so entry should be released.

Fixes: 73dd3a4839c1 ("net/mlx5: Avoid using pending command interface slots")
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
index d7470f8d355ecae7fbcaa7035d1142100e7d264e..cede5bdfd598e49b44ce133b61bc6509faf923fa 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -922,6 +922,10 @@ static void cmd_work_handler(struct work_struct *work)
                MLX5_SET(mbox_out, ent->out, syndrome, drv_synd);
 
                mlx5_cmd_comp_handler(dev, 1UL << ent->idx, true);
+               /* no doorbell, no need to keep the entry */
+               free_ent(cmd, ent->idx);
+               if (ent->callback)
+                       free_cmd(ent);
                return;
        }