From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3FBC43CCA13 for ; Fri, 13 Mar 2026 17:20:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773422454; cv=none; b=soIvuPa46Zf/QJlgeW44LsZbrNd5UZOCxAYrFdu3i/uYw1prB598/laK4H0F5Md+i5U8H1cmaE5VVoCqzV3R9HY1AdXrjoeyKYgYiFeJojw/Tge1i8+DeOThqy3ZuwyZd+OWZviQvfUULY8XL+pAR/5K4EiV3DH0l040NML431Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773422454; c=relaxed/simple; bh=tr2ly2C77tDMPqgIt4tjBLo4DHA8LRxs3CVPK/SWd6c=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Fr2CeLWw72zFizlyka5guxkUKfxK8Xaktu4PVbMzo0pHG0B5ubfBn5nDUxkawNOq/X6AMzrPu7wpctRDLYSzDzpCOaM2GRx0XQJMU9hup5ucYFk6LnmJWc8534TG9rVIAmdNU64WTzUP4hEC4SeoVKAuVS2Fyo6VlIOA38736ek= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0T9/NLiB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="0T9/NLiB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2B326C19421; Fri, 13 Mar 2026 17:20:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1773422453; bh=tr2ly2C77tDMPqgIt4tjBLo4DHA8LRxs3CVPK/SWd6c=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=0T9/NLiBtqIsGatG8x9rM8yohWvdjKxl/XGhYCOGAfFZfu90DAVhPbA+7QdfSkR98 SKYi4lyAk2ei+yHT56y7zmLLoQvAi2fo8D+GCTeJ4ADrb/Wl3WcwTnNQigVz18nkJZ 54J034uiIv3f3yMbMk3+GgThXu2bmS5zHgObGrz4= Date: Fri, 13 Mar 2026 18:20:49 +0100 From: Greg KH To: Vyacheslav Vahnenko Cc: linux-usb@vger.kernel.org Subject: Re: ezcap401 needs USB_QUIRK_NO_BOS to function on 10gbs usb speed Message-ID: <2026031321-extending-monument-a47a@gregkh> References: <2026031332-askew-policy-c4ec@gregkh> <20260313123638.20481-1-vahnenko2003@gmail.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260313123638.20481-1-vahnenko2003@gmail.com> On Fri, Mar 13, 2026 at 03:36:38PM +0300, Vyacheslav Vahnenko wrote: > Add USB_QUIRK_NO_BOS for ezcap401 capture card, without it dmesg will show > "unable to get BOS descriptor or descriptor too short" > and "unable to read config index 0 descriptor/start: -71" errors > and device will not able to work at full speed at 10gbs > > Signed-off-by: Vyacheslav Vahnenko > --- > 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 9e7e49712..0010f41a3 100644 > --- a/drivers/usb/core/quirks.c > +++ b/drivers/usb/core/quirks.c > @@ -574,6 +574,9 @@ static const struct usb_device_id usb_quirk_list[] = { > /* Alcor Link AK9563 SC Reader used in 2022 Lenovo ThinkPads */ > { USB_DEVICE(0x2ce3, 0x9563), .driver_info = USB_QUIRK_NO_LPM }, > > + /* ezcap401 - BOS descriptor fetch hangs at SuperSpeed Plus */ > + { USB_DEVICE(0x32ed, 0x0401), .driver_info = USB_QUIRK_NO_BOS }, > + > /* DELL USB GEN2 */ > { USB_DEVICE(0x413c, 0xb062), .driver_info = USB_QUIRK_NO_LPM | USB_QUIRK_RESET_RESUME }, > > -- > 2.53.0 > > Thanks Greg for your patience, I'm not familiar with email stuff let alone kernel maintenance :) Not a problem. There was some minor issues with this one (prefix of subject, and no v2 information), but I've fixed it up and applied it now, thanks! greg k-h