Stephen J. Fuhry 9ddb9c0dec USB: quirks: add NO_LPM for Lenovo ThinkPad USB-C Dock Gen2 hub controllers ...

The Lenovo ThinkPad USB-C Dock Gen2 (17ef:a391, 17ef:a392) hub
controllers exhibit link instability when USB Link Power Management
is enabled, similar to the dock's Ethernet adapter (17ef:a387) which
already carries USB_QUIRK_NO_LPM.

When the dock reconnects after a transient disconnect, the hub
controllers enter LPM states between re-enumeration retries, causing
repeated disconnect/reconnect cycles lasting up to two minutes.
Disabling LPM for these devices restores stable enumeration.

Signed-off-by: Stephen J. Fuhry <fuhrysteve@gmail.com>
Cc: stable <stable@kernel.org>
Link: https://patch.msgid.link/20260513171419.44849-1-fuhrysteve@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-05-22 11:12:34 +02:00

..

buffer.c

…

config.c

usb: core: Clean up SuperSpeed/eUSB2 descriptor validation logging

2026-05-18 15:16:58 +02:00

devices.c

…

devio.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

driver.c

usb: core: use dedicated spinlock for offload state

2026-04-02 09:43:26 +02:00

endpoint.c

usb: endpoint: drop custom sysfs attribute structure

2026-03-11 15:48:20 +01:00

file.c

…

generic.c

…

hcd-pci.c

…

hcd.c

usb: core: Fix SuperSpeed root hub wMaxPacketSize

2026-05-18 15:16:58 +02:00

hub.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

hub.h

…

Kconfig

…

ledtrig-usbport.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

Makefile

usb: core: Add tracepoints for device allocation and state changes

2025-10-22 10:58:30 +02:00

message.c

USB: core: Use krealloc() in usb_cache_string()

2026-03-18 16:03:52 +01:00

notify.c

…

of.c

USB: of: Simplify with scoped for each OF child loop

2026-04-07 13:49:48 +02:00

offload.c

usb: core: use dedicated spinlock for offload state

2026-04-02 09:43:26 +02:00

otg_productlist.h

…

phy.c

usb: core: phy: avoid double use of 'usb3-phy'

2026-04-02 09:19:31 +02:00

phy.h

…

port.c

usb: port: add delay after usb_hub_set_port_power()

2026-03-18 16:03:58 +01:00

quirks.c

USB: quirks: add NO_LPM for Lenovo ThinkPad USB-C Dock Gen2 hub controllers

2026-05-22 11:12:34 +02:00

sysfs.c

…

trace.c

usb: core: Add tracepoints for device allocation and state changes

2025-10-22 10:58:30 +02:00

trace.h

usb: core: Add tracepoints for device allocation and state changes

2025-10-22 10:58:30 +02:00

urb.c

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21 01:02:28 -08:00

usb-acpi.c

…

usb.c

usb: core: use dedicated spinlock for offload state

2026-04-02 09:43:26 +02:00

usb.h

…