From: Mika Westerberg mika.westerberg@linux.intel.com
commit acec726473822bc6b585961f4ca2a11fa7f28341 upstream.
Memory for the usb4->margining needs to be relased for the upstream port of the router as well, even though the debugfs directory gets released with the router device removal. Fix this.
Fixes: d0f1e0c2a699 ("thunderbolt: Add support for receiver lane margining") Cc: stable@vger.kernel.org Signed-off-by: Mika Westerberg mika.westerberg@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/thunderbolt/debugfs.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/thunderbolt/debugfs.c b/drivers/thunderbolt/debugfs.c index 4339e706cc3a..f92ad71ef983 100644 --- a/drivers/thunderbolt/debugfs.c +++ b/drivers/thunderbolt/debugfs.c @@ -942,7 +942,8 @@ static void margining_port_remove(struct tb_port *port)
snprintf(dir_name, sizeof(dir_name), "port%d", port->port); parent = debugfs_lookup(dir_name, port->sw->debugfs_dir); - debugfs_remove_recursive(debugfs_lookup("margining", parent)); + if (parent) + debugfs_remove_recursive(debugfs_lookup("margining", parent));
kfree(port->usb4->margining); port->usb4->margining = NULL; @@ -967,19 +968,18 @@ static void margining_switch_init(struct tb_switch *sw)
static void margining_switch_remove(struct tb_switch *sw) { + struct tb_port *upstream, *downstream; struct tb_switch *parent_sw; - struct tb_port *downstream; u64 route = tb_route(sw);
if (!route) return;
- /* - * Upstream is removed with the router itself but we need to - * remove the downstream port margining directory. - */ + upstream = tb_upstream_port(sw); parent_sw = tb_switch_parent(sw); downstream = tb_port_at(route, parent_sw); + + margining_port_remove(upstream); margining_port_remove(downstream); }