[PATCH] fix: drivers/thunderbolt: tb_tunnel_pci: missing tb_tunnel_put on success path

[WenTao Liang]

In tb_tunnel_pci(), tb_tunnel_alloc_pci() allocates a tunnel with kref
initialized to 1. On the success path, the tunnel is added to the tunnel
list via list_add_tail() but tb_tunnel_put() is never called to release
the initial reference. On the error path (tb_tunnel_activate failure),
tb_tunnel_put() is correctly called.

Add tb_tunnel_put(tunnel) after list_add_tail() on the success path.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 99cabbb006f1 ("thunderbolt: Add support for full PCIe daisy chains")
Signed-off-by: WenTao Liang <vulab@xxxxxxxxxxx>
---
 drivers/thunderbolt/tb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index c69c323e6952..57c9839b133f 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -2313,6 +2313,7 @@ static int tb_tunnel_pci(struct tb *tb, struct tb_switch *sw)
 		tb_sw_warn(sw, "failed to connect xHCI\n");
 
 	list_add_tail(&tunnel->list, &tcm->tunnel_list);
+	tb_tunnel_put(tunnel);
 	return 0;
 }
 
-- 
2.39.5 (Apple Git-154)