[PATCH] HID: quirks: Add ALWAYS_POLL quirk for Beitong BTP-KP20D dongle

[Aaron Ma <mapengyu@gmail.com>]

The BTP-KP20D dongle in Direct/HID mode (20dd:5159) re-enumerates every
few seconds because usbhid never submits its interrupt-IN URB: no HID
driver binds to the vendor-specific report descriptor, so the device is
never opened, and the firmware treats the idle endpoint as a lost link.

Add HID_QUIRK_ALWAYS_POLL to keep the interrupt-IN URB submitted from
probe time.

Signed-off-by: Aaron Ma <mapengyu@gmail.com>
---
 drivers/hid/hid-ids.h    | 3 +++
 drivers/hid/hid-quirks.c | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 1059922baaacd..2bb4952d0b0c1 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -263,6 +263,9 @@
 #define USB_VENDOR_ID_BAANTO		0x2453
 #define USB_DEVICE_ID_BAANTO_MT_190W2	0x0100
 
+#define USB_VENDOR_ID_BEITONG		0x20dd
+#define USB_DEVICE_ID_BEITONG_KP20D	0x5159
+
 #define USB_VENDOR_ID_BELKIN		0x050d
 #define USB_DEVICE_ID_FLIP_KVM		0x3201
 
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index 57d8efdd9b890..63283eb853f0f 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -45,6 +45,7 @@ static const struct hid_device_id hid_quirks[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS682), HID_QUIRK_NOGET },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS692), HID_QUIRK_NOGET },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_UC100KM), HID_QUIRK_NOGET },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_BEITONG, USB_DEVICE_ID_BEITONG_KP20D), HID_QUIRK_ALWAYS_POLL },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_MULTI_TOUCH), HID_QUIRK_MULTI_INPUT },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE), HID_QUIRK_ALWAYS_POLL },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_PIXART_USB_OPTICAL_MOUSE2), HID_QUIRK_ALWAYS_POLL },
-- 
2.53.0