[PATCH] HID: quirks: Add ALWAYS_POLL quirk for SIGMACHIP USB mouse

[PATCH] HID: quirks: Add ALWAYS_POLL quirk for SIGMACHIP USB mouse

[hlleng]

The SIGMACHIP USB mouse with VID/PID 1c4f:0034 can disconnect and
re-enumerate repeatedly after it has been enumerated if its interrupt
endpoint is not continuously polled.

This was observed with the device reporting itself as "SIGMACHIP Usb
Mouse". Keeping the input event device open avoids the disconnects.

Add HID_QUIRK_ALWAYS_POLL for this device so the HID core keeps polling
it even when there is no userspace input consumer.

Cc: stable@vger.kernel.org
Signed-off-by: hlleng <a909204013@gmail.com>
---
 drivers/hid/hid-ids.h    | 1 +
 drivers/hid/hid-quirks.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 0cf637423..c07e90dbd 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1280,6 +1280,7 @@
 
 #define USB_VENDOR_ID_SIGMA_MICRO	0x1c4f
 #define USB_DEVICE_ID_SIGMA_MICRO_KEYBOARD	0x0002
+#define USB_DEVICE_ID_SIGMA_MICRO_USB_MOUSE	0x0034
 #define USB_DEVICE_ID_SIGMA_MICRO_KEYBOARD2	0x0059
 
 #define USB_VENDOR_ID_SIGMATEL		0x066F
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index 9e88c9d6c..800b8f76d 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -187,6 +187,7 @@ static const struct hid_device_id hid_quirks[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SEMICO, USB_DEVICE_ID_SEMICO_USB_KEYKOARD), HID_QUIRK_NO_INIT_REPORTS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SENNHEISER, USB_DEVICE_ID_SENNHEISER_BTD500USB), HID_QUIRK_NOGET },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SIGMA_MICRO, USB_DEVICE_ID_SIGMA_MICRO_KEYBOARD), HID_QUIRK_NO_INIT_REPORTS },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SIGMA_MICRO, USB_DEVICE_ID_SIGMA_MICRO_USB_MOUSE), HID_QUIRK_ALWAYS_POLL },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SIGMATEL, USB_DEVICE_ID_SIGMATEL_STMP3780), HID_QUIRK_NOGET },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS1030_TOUCH), HID_QUIRK_NOGET },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SIS_TOUCH, USB_DEVICE_ID_SIS817_TOUCH), HID_QUIRK_NOGET },
-- 
2.54.0

Re: [PATCH] HID: quirks: Add ALWAYS_POLL quirk for SIGMACHIP USB mouse

[Benjamin Tissoires]

On Tue, 12 May 2026 09:57:37 +0800, hlleng wrote:
> The SIGMACHIP USB mouse with VID/PID 1c4f:0034 can disconnect and
> re-enumerate repeatedly after it has been enumerated if its interrupt
> endpoint is not continuously polled.
> 
> This was observed with the device reporting itself as "SIGMACHIP Usb
> Mouse". Keeping the input event device open avoids the disconnects.
> 
> [...]

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git (for-7.1/upstream-fixes), thanks!

[1/1] HID: quirks: Add ALWAYS_POLL quirk for SIGMACHIP USB mouse
      https://git.kernel.org/hid/hid/c/07466fc91c55

Cheers,
-- 
Benjamin Tissoires <bentiss@kernel.org>