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 775702D9780; Wed, 28 Jan 2026 15:29:34 +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=1769614174; cv=none; b=p1PvQI4Upgbg+yER+4tMz9euqDy+2BcmzGtBmwOrkc68HzKcI65vbvGApdCmgAYESysPQ5r9Sr+fuU8GUkpZ/WarmKSrkt1TwlVsWBZJpLvxwTKUjydlead4IGYADBQpJor478nUkUkOJgkm14tEGfPtMaG3t5+0JPVOxZeRS9Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769614174; c=relaxed/simple; bh=j/jQdbemDabydDopaczq1GO5VYNdEx4MB8mvUjBxAhs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=eSM2voNJ8xAr3PkoJDNlq+4tjLMiBQCQvgt8bLLCbRqczXKOp731uap1YmhL/vwa7xon0lpebkw4jbOdCE/0KDZSuHjkzpXO+X3Uwc6fwi399nvxtoI6ilTFd/3bdJZrOpRbFXTucYyKwr8/fS7xROH+bvNRSu78mT03lPS2EQI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=AEJB2OPy; 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="AEJB2OPy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 908D6C4CEF1; Wed, 28 Jan 2026 15:29:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1769614174; bh=j/jQdbemDabydDopaczq1GO5VYNdEx4MB8mvUjBxAhs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AEJB2OPymw+CpxMtuHlSpFFij4ZyvRrdJnBM9fhC/9z7FaSkx09QydXPftS4QpLWz liKWdpJl3SvjBSxy8Fs1HYg63qBb2NR3LTHqD49MhW7QMFDYVF8BdsTn539wg856V9 Pj7/keeJQNDabs4eJuGxe5VXno3z5rj/ii1AAlwQ= 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 6.6 057/254] usb: core: add USB_QUIRK_NO_BOS for devices that hang on BOS descriptor Date: Wed, 28 Jan 2026 16:20:33 +0100 Message-ID: <20260128145346.751639088@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260128145344.698118637@linuxfoundation.org> References: <20260128145344.698118637@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 6.6-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 */