USB: Disable LPM on WD19's Realtek Hub

commit b63e48fb50e1ca71db301ca9082befa6f16c55c4 upstream.

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>

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 64c03e871f2d1d70f781acffbff4f7d8ff64c69c..f7d57b508b9ea37eea1369c063979b105fa6e380 100644 (file)
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -229,6 +229,9 @@ 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 },