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@xxxxxxxxxxxxxxx>
---
drivers/usb/core/hub.c | 6 ++++--
drivers/usb/core/quirks.c | 4 ++++
include/linux/usb/quirks.h | 3 +++
3 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 8a4dcbc..5df1457 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1977,8 +1977,10 @@ 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 bae636e..e7d1e3c 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -159,6 +159,10 @@ 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 55a17b1..0f784c3 100644
--- a/include/linux/usb/quirks.h
+++ b/include/linux/usb/quirks.h
@@ -41,4 +41,7 @@
*/
#define USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL 0x00000080
+/* device generates spurious wakeup, ignore remote wakeup capability */
+#define USB_QUIRK_IGNORE_REMOTE_WAKEUP 0x00000100
+
#endif /* __LINUX_USB_QUIRKS_H */
--
1.9.1
--
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