6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Yaxiong Tian <tianyaxiong@xxxxxxxxxx>
commit ac43c9122e4287bbdbe91e980fc2528acb72cc1e upstream.
The dentry returned by debugfs_lookup() needs to be released by calling
dput() which is missing in margining_port_remove(). Fix this by calling
debugfs_lookup_and_remove() that combines both and avoids the memory leak.
Fixes: d0f1e0c2a699 ("thunderbolt: Add support for receiver lane margining")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Yaxiong Tian <tianyaxiong@xxxxxxxxxx>
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/thunderbolt/debugfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/thunderbolt/debugfs.c
+++ b/drivers/thunderbolt/debugfs.c
@@ -959,7 +959,7 @@ static void margining_port_remove(struct
snprintf(dir_name, sizeof(dir_name), "port%d", port->port);
parent = debugfs_lookup(dir_name, port->sw->debugfs_dir);
if (parent)
- debugfs_remove_recursive(debugfs_lookup("margining", parent));
+ debugfs_lookup_and_remove("margining", parent);
kfree(port->usb4->margining);
port->usb4->margining = NULL;
