linux-kernel - Re: [PATCH] usb: add QUIRK_NO

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Message-ID: <2026020457-distrust-vision-e5de@gregkh>
Date: Wed, 4 Feb 2026 06:15:09 +0100
From: Greg KH <gregkh@...uxfoundation.org>
To: A1RM4X <dev@...m4x.com>
Cc: linux-usb@...r.kernel.org, limiao@...inos.cn, oneukum@...e.com,
	huanglei@...inos.cn, lijiayi@...inos.cn,
	johannes.bruederl@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: add QUIRK_NO_BOS for several devices

On Tue, Feb 03, 2026 at 10:29:38PM -0500, A1RM4X wrote:
> Add QUIRK_NO_BOS entries for:
>  * ASUS TUF 4K PRO (0x0b05:0x1ab9)
>  * Avermedia Live Gamer Ultra 2.1 (0x07ca:0x2553)
>  * UGREEN 35871 (0x2b89:0x5871)

Why?  What is the results without this option being used here?  And what
happens when userspace goes and asks for this descriptor?

> Signed-off-by: A1RM4X <dev@...m4x.com>

We need a real name, sorry.

> ---
>  drivers/usb/core/quirks.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
> index c4d85089d19b..ddce45ce9f6c 100644
> --- a/drivers/usb/core/quirks.c
> +++ b/drivers/usb/core/quirks.c
> @@ -453,6 +453,15 @@ static const struct usb_device_id usb_quirk_list[] = {
>  	/* Elgato 4K X - BOS descriptor fetch hangs at SuperSpeed Plus */
>  	{ USB_DEVICE(0x0fd9, 0x009b), .driver_info = USB_QUIRK_NO_BOS },
>  
> +	/* ASUS TUF 4K PRO - BOS descriptor fetch hangs at SuperSpeed Plus */
> +	{ USB_DEVICE(0x0b05, 0x1ab9), .driver_info = USB_QUIRK_NO_BOS },
> +
> +	/* Avermedia Live Gamer Ultra 2.1 (GC553G2) - BOS descriptor fetch hangs at SuperSpeed Plus */
> +	{ USB_DEVICE(0x07ca, 0x2553), .driver_info = USB_QUIRK_NO_BOS },
> +
> +	/* UGREEN 35871 - BOS descriptor fetch hangs at SuperSpeed Plus */
> +	{ USB_DEVICE(0x2b89, 0x5871), .driver_info = USB_QUIRK_NO_BOS },

Please read the comment for this structure for how to place these in the
list.

thanks,

greg k-h