Commit 24d85bb3 authored by Gil Fine's avatar Gil Fine Committed by Mika Westerberg
Browse files

thunderbolt: Set lane bonding bit only for downstream port 



Fix the lane bonding procedure to follow the steps described in USB4
Connection Manager guide. Hence, set the lane bonding bit only for
downstream port. This is needed for certain ASMedia device, otherwise
lane bonding fails and the device disconnects.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarGil Fine <gil.fine@linux.intel.com>
Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
parent b85ea95d

drivers/thunderbolt/switch.c

+1 −1
Original line number Diff line number Diff line
@@ -1143,7 +1143,7 @@ int tb_port_lane_bonding_enable(struct tb_port *port) 
	 * Only set bonding if the link was not already bonded. This

	 * avoids the lane adapter to re-enter bonding state.

	 */

	if (width == TB_LINK_WIDTH_SINGLE) {

	if (width == TB_LINK_WIDTH_SINGLE && !tb_is_upstream_port(port)) {

		ret = tb_port_set_lane_bonding(port, true);

		if (ret)

			goto err_lane1;