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 764F7376BDD; Wed, 21 Jan 2026 18:21:30 +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=1769019690; cv=none; b=u1YigVB1HN1fh+SuczYin/NT6BDbgMklWN/E1yfmGa9TYgCglVVdBy7/r8K9MzW7sBEaX0thklx9j639kER6zZCons038oE8CN1C/MZIVThOVaU7XCzIdmhZCxwXAl84+QwmkuW+94v1WCNAKPoZbGhKtGlK2msTpaheQj4KAfM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769019690; c=relaxed/simple; bh=1QfUGiX28PEQonO2s4dUKnc1knPpv+lFkLqTB2FznXI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=VUAeiQ8q+aNPWQ5ASc2YnUnQAe2QqVTIDBQPtOM95ZB6QTLOz94X9kK53SaFptbtEeoqXcLC2IG3kojlcNBXfaOWJkVHBmGuxrHIWCMi+2KHSkEMeiXXtGutdhaB8zV7d5fmzcSc4v9zMwMa5E1IOua/l5dSJkfBs5is89FgbeU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pBLQKTco; 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="pBLQKTco" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9EFBEC4CEF1; Wed, 21 Jan 2026 18:21:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1769019690; bh=1QfUGiX28PEQonO2s4dUKnc1knPpv+lFkLqTB2FznXI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pBLQKTcoCSDoOe20TArXq9iXTREKLKfTzXA+DQfz7H6/XjBnnV7sck92I7OoOVgdo yjRslfO6lNOfcHBwNtNqVUP3V1EHZg6Yg3698uBcuof5l6LD3aDVG1qZbfj9y/n7gx It0nSNoUkvbdOykmgkX8lhjYTVZBUwkbJC1p66VE= 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 6.12 079/139] usb: core: add USB_QUIRK_NO_BOS for devices that hang on BOS descriptor Date: Wed, 21 Jan 2026 19:15:27 +0100 Message-ID: <20260121181414.295020273@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260121181411.452263583@linuxfoundation.org> References: <20260121181411.452263583@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 6.12-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 */