USB: Add device quirk for ASUS T100 Base Station keyboard

This full-speed USB device generates spurious remote wakeup event
as soon as USB_DEVICE_REMOTE_WAKEUP feature is set. As the result,
Linux can't enter system suspend and S0ix power saving modes once
this keyboard is used.

This patch tries to introduce USB_QUIRK_IGNORE_REMOTE_WAKEUP quirk.
With this quirk set, wakeup capability will be ignored during
device configure.

This patch could be back-ported to kernels as old as 2.6.39.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index db1d587..d541929 100644 (file)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1984,8 +1984,10 @@ void usb_set_device_state(struct usb_device *udev,
                                        || new_state == USB_STATE_SUSPENDED)
                                ;       /* No change to wakeup settings */
                        else if (new_state == USB_STATE_CONFIGURED)
-                               wakeup = udev->actconfig->desc.bmAttributes
-                                        & USB_CONFIG_ATT_WAKEUP;
+                               wakeup = (udev->quirks &
+                                       USB_QUIRK_IGNORE_REMOTE_WAKEUP) ? 0 :
+                                       udev->actconfig->desc.bmAttributes &
+                                       USB_CONFIG_ATT_WAKEUP;
                        else
                                wakeup = 0;
                }

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index a342a78..5ae883d 100644 (file)
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -163,6 +163,10 @@ static const struct usb_device_id usb_quirk_list[] = {
        /* USB3503 */
        { USB_DEVICE(0x0424, 0x3503), .driver_info = USB_QUIRK_RESET_RESUME },
 
+       /* ASUS Base Station(T100) */
+       { USB_DEVICE(0x0b05, 0x17e0), .driver_info =
+                       USB_QUIRK_IGNORE_REMOTE_WAKEUP },
+
        { }  /* terminating entry must be last */
 };
 

diff --git a/include/linux/usb/quirks.h b/include/linux/usb/quirks.h
index ffe565c..a4abaeb 100644 (file)
--- a/include/linux/usb/quirks.h
+++ b/include/linux/usb/quirks.h
@@ -44,4 +44,7 @@
 /* device can't handle device_qualifier descriptor requests */
 #define USB_QUIRK_DEVICE_QUALIFIER     0x00000100
 
+/* device generates spurious wakeup, ignore remote wakeup capability */
+#define USB_QUIRK_IGNORE_REMOTE_WAKEUP 0x00000200
+
 #endif /* __LINUX_USB_QUIRKS_H */