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 6FAA8423A6B; Wed, 4 Feb 2026 15:05:53 +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=1770217553; cv=none; b=Uh5suzaM0z1Qb3UmyS6XKc6ILgnBj/eCFbzXKQI0aAIZDoDioxr6P3VJthBZ3+HzhfG50Lh6aNymOnhrnWXDaAfw5Yj/ijIS1zJh/fR/AoJjZKL78+eU7TO/Pp2LpgNg7RsycEhgLPJ6bUeBm1sgAU4tT4dqUpqD7IwFo/L385Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770217553; c=relaxed/simple; bh=AwTaZxdNwG4AfAxE7lyau58URsgWlsUwl1pWYceA8WI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=IgcF0MwuH/htUBMCW+Tv/Kl2eD80SzdKNZ8Ai3HvNpYKiPBzyMMPV4G+BFcLtfSLGO13iI76dpIQ1SrSyM2VnGDtTeJ1ceuMHN5/MGGRTPTpgjcr370i7aXfzG7W1ix9CHYxSze8lPXuSaaIdABefk5jgQn3Wa80nuKd48H9Os8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IsNCMnoh; 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="IsNCMnoh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E3E1BC4CEF7; Wed, 4 Feb 2026 15:05:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1770217553; bh=AwTaZxdNwG4AfAxE7lyau58URsgWlsUwl1pWYceA8WI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IsNCMnohH/kwjDUpIl8QPupfHrFwCsRO8PFjnDJRPEdq6CNZ3TM5aHbCV4aOYsJ45 ztD/kTVXt+rYKjhOMIrBft8cyVIRbeGiW7X6/79+RYcOx6JoYe9igbJiHiXmW6vCCA exjVXky68UW/lxVvnH4gSCkZ1AYKgcDOCBWXvZz0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , =?UTF-8?q?Johannes=20Br=C3=BCderl?= Subject: [PATCH 6.1 048/280] usb: core: add USB_QUIRK_NO_BOS for devices that hang on BOS descriptor Date: Wed, 4 Feb 2026 15:37:02 +0100 Message-ID: <20260204143911.365125524@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260204143909.614719725@linuxfoundation.org> References: <20260204143909.614719725@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johannes Brüderl commit 2740ac33c87b3d0dfa022efd6ba04c6261b1abbd upstream. Add USB_QUIRK_NO_BOS quirk flag to skip requesting the BOS descriptor for devices that cannot handle it. Add Elgato 4K X (0fd9:009b) to the quirk table. This device hangs when the BOS descriptor is requested at SuperSpeed Plus (10Gbps). Link: https://bugzilla.kernel.org/show_bug.cgi?id=220027 Cc: stable Signed-off-by: Johannes Brüderl Link: https://patch.msgid.link/20251207090220.14807-1-johannes.bruederl@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/config.c | 5 +++++ drivers/usb/core/quirks.c | 3 +++ include/linux/usb/quirks.h | 3 +++ 3 files changed, 11 insertions(+) --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -1004,6 +1004,11 @@ int usb_get_bos_descriptor(struct usb_de __u8 cap_type; int ret; + if (dev->quirks & USB_QUIRK_NO_BOS) { + dev_dbg(ddev, "skipping BOS descriptor\n"); + return -ENOMSG; + } + bos = kzalloc(sizeof(*bos), GFP_KERNEL); if (!bos) return -ENOMEM; --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -447,6 +447,9 @@ static const struct usb_device_id usb_qu { USB_DEVICE(0x0c45, 0x7056), .driver_info = USB_QUIRK_IGNORE_REMOTE_WAKEUP }, + /* Elgato 4K X - BOS descriptor fetch hangs at SuperSpeed Plus */ + { USB_DEVICE(0x0fd9, 0x009b), .driver_info = USB_QUIRK_NO_BOS }, + /* Sony Xperia XZ1 Compact (lilac) smartphone in fastboot mode */ { USB_DEVICE(0x0fce, 0x0dde), .driver_info = USB_QUIRK_NO_LPM }, --- a/include/linux/usb/quirks.h +++ b/include/linux/usb/quirks.h @@ -75,4 +75,7 @@ /* short SET_ADDRESS request timeout */ #define USB_QUIRK_SHORT_SET_ADDRESS_REQ_TIMEOUT BIT(16) +/* skip BOS descriptor request */ +#define USB_QUIRK_NO_BOS BIT(17) + #endif /* __LINUX_USB_QUIRKS_H */