From 395e9f2967a7ac6898026e8f136c369805dc2fd9 Mon Sep 17 00:00:00 2001 From: Kurt Lieber Date: Thu, 24 Sep 2026 12:26:37 +0000 Subject: thunderbolt: Disable CL states for the Anker Prime TB5 dock The Anker Prime TB5 dock identifies itself in the DROM as 01ea:83b5. Its router config space is an Intel Barlow Ridge 80G hub (8087:5786). The upstream lane adapter advertises CL0s, CL1, and CL2. With CLx left enabled, TMU uni-directional LowRes setup fails with -ENOTCONN, the USB3 and DisplayPort tunnels are aborted, and the router reconnects in a loop. Loading thunderbolt with clx=0 keeps the link up on this machine. Match the DROM id together with the Barlow Ridge hub id and disable CL states for this dock only. QUIRK_NO_CLX takes the same early-out as the module parameter, without disabling CLx for every other router. Closes: https://lore.kernel.org/linux-usb/SJ0PR15MB4696D491504DB667AA8E0617A3812@SJ0PR15MB4696.namprd15.prod.outlook.com/ Cc: stable@vger.kernel.org Assisted-by: LLM Signed-off-by: Kurt Lieber Signed-off-by: Mika Westerberg --- drivers/thunderbolt/quirks.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/thunderbolt/quirks.c b/drivers/thunderbolt/quirks.c index 9f7914ac2..96b7fe038 100644 --- a/drivers/thunderbolt/quirks.c +++ b/drivers/thunderbolt/quirks.c @@ -99,6 +99,9 @@ static const struct tb_quirk tb_quirks[] = { quirk_usb3_maximum_bandwidth }, { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_40G_BRIDGE, 0x0000, 0x0000, quirk_usb3_maximum_bandwidth }, + /* CLx is unstable on the Anker Prime TB5 dock (DROM 01ea:83b5) */ + { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_80G_BRIDGE, 0x01ea, 0x83b5, + quirk_clx_disable }, /* * Block Runtime PM in DP redrive mode for Intel Barlow Ridge host * controllers. -- cgit v1.3.1