Commit b63e48fb authored Feb 05, 2020 by Kai-Heng Feng Committed by Greg Kroah-Hartman Mar 12, 2020

USB: Disable LPM on WD19's Realtek Hub



Realtek Hub (0bda:0x0487) used in Dell Dock WD19 sometimes drops off the
bus when bringing underlying ports from U3 to U0.

Disabling LPM on the hub during setting link state is not enough, so
let's disable LPM completely for this hub.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200205112633.25995-3-kai.heng.feng@canonical.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 16263abc

drivers/usb/core/quirks.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -378,6 +378,9 @@ static const struct usb_device_id usb_quirk_list[] = {
		{ USB_DEVICE(0x0b05, 0x17e0), .driver_info =
		USB_QUIRK_IGNORE_REMOTE_WAKEUP },

		/* Realtek hub in Dell WD19 (Type-C) */
		{ USB_DEVICE(0x0bda, 0x0487), .driver_info = USB_QUIRK_NO_LPM },

		/* Action Semiconductor flash disk */
		{ USB_DEVICE(0x10d6, 0x2200), .driver_info =
		USB_QUIRK_STRING_FETCH_255 },

Admin message