This is a note to let you know that I've just added the patch titled
thunderbolt: Set lane bonding bit only for downstream port
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
thunderbolt-set-lane-bonding-bit-only-for-downstream-port.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 24d85bb3be373b5831699bddf698b392bd2b904d Mon Sep 17 00:00:00 2001
From: Gil Fine <gil.fine@xxxxxxxxxxxxxxx>
Date: Tue, 7 Nov 2023 12:22:40 +0200
Subject: thunderbolt: Set lane bonding bit only for downstream port
From: Gil Fine <gil.fine@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx
Signed-off-by: Gil Fine <gil.fine@xxxxxxxxxxxxxxx>
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
Patches currently in stable-queue which might be from gil.fine@xxxxxxxxxxxxxxx are
queue-6.6/thunderbolt-set-lane-bonding-bit-only-for-downstream-port.patch
