6.6-stable review patch. If anyone has any objections, please let me know.
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From: Gil Fine gil.fine@linux.intel.com
commit 24d85bb3be373b5831699bddf698b392bd2b904d upstream.
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: Gil Fine gil.fine@linux.intel.com Signed-off-by: Mika Westerberg mika.westerberg@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/thunderbolt/switch.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1082,7 +1082,7 @@ int tb_port_lane_bonding_enable(struct t * 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;