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authorKai-Heng Feng <kai.heng.feng@canonical.com>2020-02-05 12:26:33 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-03-12 09:34:42 +0100
commitb63e48fb50e1ca71db301ca9082befa6f16c55c4 (patch)
treec3f1b4a14d955bfd701614a53428f811003c960b
parentusb: xhci: apply XHCI_SUSPEND_DELAY to AMD XHCI controller 1022:145c (diff)
downloadlinux-b63e48fb50e1ca71db301ca9082befa6f16c55c4.tar.xz
linux-b63e48fb50e1ca71db301ca9082befa6f16c55c4.zip
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>
-rw-r--r--drivers/usb/core/quirks.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 2dac3e7cdd97..df6e6156e1d4 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -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 },