6.15-stable review patch. If anyone has any objections, please let me know.
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From: Heikki Krogerus heikki.krogerus@linux.intel.com
commit 3b18405763c1ebb1efc15feef5563c9cdb2cc3a7 upstream.
The device link to the USB4 host interface has to be removed manually since it's no longer auto removed.
Fixes: 623dae3e7084 ("usb: acpi: fix boot hang due to early incorrect 'tunneled' USB3 device links") Cc: stable stable@kernel.org Signed-off-by: Heikki Krogerus heikki.krogerus@linux.intel.com Reviewed-by: Mika Westerberg mika.westerberg@linux.intel.com Link: https://lore.kernel.org/r/20250611111415.2707865-1-heikki.krogerus@linux.int... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/core/hub.c | 3 +++ drivers/usb/core/usb-acpi.c | 4 +++- include/linux/usb.h | 2 ++ 3 files changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2337,6 +2337,9 @@ void usb_disconnect(struct usb_device ** usb_remove_ep_devs(&udev->ep0); usb_unlock_device(udev);
+ if (udev->usb4_link) + device_link_del(udev->usb4_link); + /* Unregister the device. The device driver is responsible * for de-configuring the device and invoking the remove-device * notifier chain (used by usbfs and possibly others). --- a/drivers/usb/core/usb-acpi.c +++ b/drivers/usb/core/usb-acpi.c @@ -157,7 +157,7 @@ EXPORT_SYMBOL_GPL(usb_acpi_set_power_sta */ static int usb_acpi_add_usb4_devlink(struct usb_device *udev) { - const struct device_link *link; + struct device_link *link; struct usb_port *port_dev; struct usb_hub *hub;
@@ -188,6 +188,8 @@ static int usb_acpi_add_usb4_devlink(str dev_dbg(&port_dev->dev, "Created device link from %s to %s\n", dev_name(&port_dev->child->dev), dev_name(nhi_fwnode->dev));
+ udev->usb4_link = link; + return 0; }
--- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -614,6 +614,7 @@ struct usb3_lpm_parameters { * FIXME -- complete doc * @authenticated: Crypto authentication passed * @tunnel_mode: Connection native or tunneled over USB4 + * @usb4_link: device link to the USB4 host interface * @lpm_capable: device supports LPM * @lpm_devinit_allow: Allow USB3 device initiated LPM, exit latency is in range * @usb2_hw_lpm_capable: device can perform USB2 hardware LPM @@ -724,6 +725,7 @@ struct usb_device { unsigned reset_resume:1; unsigned port_is_suspended:1; enum usb_link_tunnel_mode tunnel_mode; + struct device_link *usb4_link;
int slot_id; struct usb2_lpm_parameters l1_params;