[PATCH] USB: quirks: add USB_QUIRK_NO_LPM for ELECOM DEFT Pro TrackBall

[David Pieters]

The 2.4GHz wireless USB receiver of the ELECOM DEFT Pro TrackBall
(056e:0132) and its wired counterpart (056e:0131) fail to handle USB
Link Power Management (LPM / USB 2.0 L1 sleep states) during initial
enumeration on modern USB host controllers. When LPM negotiation occurs
at boot, the device stalls and fails to register any input events until
it is physically unplugged and replugged.

Applying USB_QUIRK_NO_LPM prevents LPM negotiation and allows the device
to initialize properly at system boot.

Signed-off-by: David Pieters <davidpieters1978@xxxxxxxxx>
---
 drivers/usb/core/quirks.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 1234567..89abcdef 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -350,6 +350,10 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Corsair Strafe RGB */
 	{ USB_DEVICE(0x1b1c, 0x1b20), .driver_info = USB_QUIRK_DELAY_INIT },

+	/* ELECOM DEFT Pro TrackBall (fails on USB Link Power Management) */
+	{ USB_DEVICE(0x056e, 0x0131), .driver_info = USB_QUIRK_NO_LPM },
+	{ USB_DEVICE(0x056e, 0x0132), .driver_info = USB_QUIRK_NO_LPM },
+
 	{ }  /* terminating entry must be last */
 };

-- 
2.43.0