From ddbe1fca0bcb87ca8c199ea873a456ca8a948567 Mon Sep 17 00:00:00 2001 From: Lu Baolu Date: Fri, 19 Sep 2014 10:13:50 +0800 Subject: [PATCH] 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 Acked-by: Alan Stern Cc: stable Signed-off-by: Greg Kroah-Hartman --- 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 db1d587cbb95..d5419292f89f 100644 --- 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 a342a783d496..5ae883dc21f5 100644 --- 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 ffe565c94743..a4abaeb3fb00 100644 --- 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 */ -- 2.20.1