From 0fd758d6112f867b2cc6df0f6a856048ff99b211 Mon Sep 17 00:00:00 2001
From: Mark Bloch <markb@mellanox.com>
Date: Mon, 5 Sep 2016 10:58:04 +0000
Subject: [PATCH] net/mlx5: Don't unlock fte while still using it
When adding a new rule to an fte, we need to hold the fte lock
until we add that rule to the fte and increase the fte ref count.
Fixes: 0c56b97503fd ("net/mlx5_core: Introduce flow steering API")
Signed-off-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 5da2cc8785824..a07ff305b44fd 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -1107,9 +1107,8 @@ static struct mlx5_flow_rule *add_rule_fg(struct mlx5_flow_group *fg,
return rule;
}
rule = add_rule_fte(fte, fg, dest);
- unlock_ref_node(&fte->node);
if (IS_ERR(rule))
- goto unlock_fg;
+ goto unlock_fte;
else
goto add_rule;
}
@@ -1127,6 +1126,7 @@ static struct mlx5_flow_rule *add_rule_fg(struct mlx5_flow_group *fg,
goto unlock_fg;
}
tree_init_node(&fte->node, 0, del_fte);
+ nested_lock_ref_node(&fte->node, FS_MUTEX_CHILD);
rule = add_rule_fte(fte, fg, dest);
if (IS_ERR(rule)) {
kfree(fte);
@@ -1139,6 +1139,8 @@ static struct mlx5_flow_rule *add_rule_fg(struct mlx5_flow_group *fg,
list_add(&fte->node.list, prev);
add_rule:
tree_add_node(&rule->node, &fte->node);
+unlock_fte:
+ unlock_ref_node(&fte->node);
unlock_fg:
unlock_ref_node(&fg->node);
return rule;