[PATCH] USB: core: add USB_QUIRK_NO_LPM for VIA Labs USB 2.0 hub

[PATCH] USB: core: add USB_QUIRK_NO_LPM for VIA Labs USB 2.0 hub

[Rodrigo Lugathe da Conceição Alves]

The VIA Labs, Inc. USB 2.0 hub controller (2109:2817), 
found in a KVM switch, fails to enumerate high-power devices during 
cold boot and system restart. 

Applying the kernel parameter 
  usbcore.quirks=2109:2817:k 
resolves the issue. 

Enumeration failure log: 
  usb 1-1.2.3: device descriptor read/64, error -32 
  usb 1-1.2.3: Device not responding to setup address. 
  usb 1-1.2.3: device not accepting address 11, error -71 
  usb 1-1.2-port3: unable to enumerate USB device 

Add USB_QUIRK_NO_LPM for this device.

Signed-off-by: Rodrigo Lugathe da Conceição Alves <lugathe2@gmail.com>
---
 drivers/usb/core/quirks.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 87810eff974e..a72c8cdf9777 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -576,6 +576,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* VLI disk */
 	{ USB_DEVICE(0x2109, 0x0711), .driver_info = USB_QUIRK_NO_LPM },
 
+	/* VIA Labs, Inc. USB2.0 Hub */
+	{ USB_DEVICE(0x2109, 0x2817), .driver_info = USB_QUIRK_NO_LPM },
+
 	/* Raydium Touchscreen */
 	{ USB_DEVICE(0x2386, 0x3114), .driver_info = USB_QUIRK_NO_LPM },
 
-- 
2.54.0

Re: [PATCH] USB: core: add USB_QUIRK_NO_LPM for VIA Labs USB 2.0 hub

[The-Luga]

Hi Greg,

Some additional information about the affected device.

The hub (2109:2817, bcdDevice 0.30) advertises USB 2.0 Link Power
Management support:

USB 2.0 Extension Device Capability:
  bmAttributes   0x00000006
    BESL Link Power Management (LPM) Supported

The KVM switch topology:

xHCI -> Terminus 1a40:0101 -> VIA Labs 2109:2817

Thanks,
Rodrigo